diff --git a/package-lock.json b/package-lock.json
index 1433ade..24c9e53 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -531,6 +531,7 @@
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       "integrity": "sha1-u13KOCu5TwXhUZQ3PRb9O6HKEQ0=",
       "dev": true,
+      "optional": true,
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         "readable-stream": "^2.0.6"
@@ -1228,6 +1229,7 @@
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       "integrity": "sha1-OciRjO/1eZ+D+UkqhI9iWt0Mdm8=",
       "dev": true,
+      "optional": true,
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       }
@@ -1371,7 +1373,8 @@
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       "integrity": "sha1-JrOIXRD6E9t/wBquOquHAZngEkw=",
-      "dev": true
+      "dev": true,
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@@ -1911,7 +1914,8 @@
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       "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -2474,7 +2478,8 @@
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       "integrity": "sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -2946,18 +2951,32 @@
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-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.4.0.tgz",
-      "integrity": "sha1-ysmvh2LIWDYYcAPI3+GT5eLq5d8=",
+      "version": "6.5.4",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
+      "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
       "dev": true,
       "requires": {
-        "bn.js": "^4.4.0",
-        "brorand": "^1.0.1",
+        "bn.js": "^4.11.9",
+        "brorand": "^1.1.0",
         "hash.js": "^1.0.0",
-        "hmac-drbg": "^1.0.0",
-        "inherits": "^2.0.1",
-        "minimalistic-assert": "^1.0.0",
-        "minimalistic-crypto-utils": "^1.0.0"
+        "hmac-drbg": "^1.0.1",
+        "inherits": "^2.0.4",
+        "minimalistic-assert": "^1.0.1",
+        "minimalistic-crypto-utils": "^1.0.1"
+      },
+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+          "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==",
+          "dev": true
+        },
+        "inherits": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+          "dev": true
+        }
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@@ -3905,7 +3924,8 @@
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           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3956,7 +3976,8 @@
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           "version": "0.4.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -3971,6 +3992,7 @@
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           "bundled": true,
           "dev": true,
+          "optional": true,
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           }
@@ -3979,6 +4001,7 @@
           "version": "2.10.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
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           }
@@ -3987,6 +4010,7 @@
           "version": "1.1.7",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -3995,7 +4019,8 @@
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           "version": "1.0.0",
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-          "dev": true
+          "dev": true,
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@@ -4012,7 +4037,8 @@
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           "version": "1.1.0",
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-          "dev": true
+          "dev": true,
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@@ -4026,22 +4052,26 @@
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           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "1.1.0",
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+          "dev": true,
+          "optional": true
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           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
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         "cryptiles": {
           "version": "2.0.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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           }
@@ -4114,7 +4144,8 @@
         "extsprintf": {
           "version": "1.0.2",
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-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -4136,12 +4167,14 @@
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           "version": "1.0.0",
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-          "dev": true
+          "dev": true,
+          "optional": true
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         "fstream": {
           "version": "1.0.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4197,6 +4230,7 @@
           "version": "7.1.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "fs.realpath": "^1.0.0",
             "inflight": "^1.0.4",
@@ -4209,7 +4243,8 @@
         "graceful-fs": {
           "version": "4.1.11",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "1.0.5",
@@ -4237,6 +4272,7 @@
           "version": "3.1.3",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "boom": "2.x.x",
             "cryptiles": "2.x.x",
@@ -4247,7 +4283,8 @@
         "hoek": {
           "version": "2.16.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "1.1.1",
@@ -4264,6 +4301,7 @@
           "version": "1.0.6",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4272,7 +4310,8 @@
         "inherits": {
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-          "dev": true
+          "dev": true,
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@@ -4284,6 +4323,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4297,7 +4337,8 @@
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           "version": "1.0.0",
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@@ -4386,6 +4427,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4393,12 +4435,14 @@
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           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4472,6 +4516,7 @@
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           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4501,7 +4546,8 @@
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           "version": "1.0.1",
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@@ -4512,7 +4558,8 @@
         "process-nextick-args": {
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@@ -4550,6 +4597,7 @@
           "version": "2.2.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4594,6 +4642,7 @@
           "version": "2.6.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
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@@ -4601,7 +4650,8 @@
         "safe-buffer": {
           "version": "5.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "5.3.0",
@@ -4625,6 +4675,7 @@
           "version": "1.0.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
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           }
@@ -4658,6 +4709,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4668,6 +4720,7 @@
           "version": "1.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4682,6 +4735,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4696,6 +4750,7 @@
           "version": "2.2.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4751,7 +4806,8 @@
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           "version": "1.0.2",
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-          "dev": true
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@@ -4780,7 +4836,8 @@
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           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
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       "integrity": "sha1-XB+x8RdHcRTwYyoOtLcbPLD9MXE=",
       "dev": true,
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       "integrity": "sha1-LANAXHU4w51+s3sxcCLjJfsBi/c=",
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-      "dev": true
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       "integrity": "sha1-ILt0A9POo5jpHcRxCo/xuCdKJe0=",
-      "dev": true
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@@ -5570,6 +5631,7 @@
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       "integrity": "sha1-zBzjjkU7+YSg93AtLdWcc9CBKEo=",
       "dev": true,
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@@ -5622,6 +5684,7 @@
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       "integrity": "sha1-rQFScUOi6Hc8+uapb1hla7UqNLI=",
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@@ -5631,7 +5694,8 @@
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-      "dev": true
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       "integrity": "sha1-UaGp50SOy9Ms2lRCFnW7IbwJPaY=",
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@@ -6661,7 +6727,8 @@
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-          "dev": true
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           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
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       "integrity": "sha1-ecSQihwPXzdbc/6IjamCj23JY6Q=",
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       "integrity": "sha1-z1mU4v0mjQD1zw+nZ6CBae2wfsA=",
       "dev": true,
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-      "dev": true
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       "dev": true,
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       "integrity": "sha1-1275EnyyPCJZ7bHoNJwujV4tdME=",
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@@ -10273,6 +10351,7 @@
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       "integrity": "sha1-W4t/x8jzQcU+0FbpKbe/Tei6e1o=",
       "dev": true,
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@@ -10283,6 +10362,7 @@
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       "dev": true,
+      "optional": true,
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@@ -11183,6 +11263,7 @@
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       "integrity": "sha1-WITKtRLPHTVeP7eE8wgEsrUg23I=",
       "dev": true,
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@@ -11284,7 +11365,8 @@
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       "integrity": "sha1-a7rwh3UA02vjTsqlhODbn+8DUgk=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "union-value": {
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@@ -12914,6 +12996,7 @@
       "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.2.tgz",
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       "dev": true,
+      "optional": true,
       "requires": {
         "string-width": "^1.0.2"
       }