Bump dependency versions, nodejs versions

Author: sqmk

Diff for: .travis.yml

@@ -1,9 +1,9 @@
 language: node_js
 
 node_js:
-    - "6.14.2"
-    - "8.11.2"
-    - "10.4.0"
+    - "6.14.4"
+    - "8.12.0"
+    - "10.10.0"
 
 script:
     - npm run test

Diff for: package.json

@@ -23,15 +23,15 @@
     "test": "mocha"
   },
   "dependencies": {
-    "moment": "~2.22.2",
-    "axios": "~0.18.0",
-    "sprintf-js": "~1.1.1"
+    "moment": "^2.22.2",
+    "axios": "^0.18.0",
+    "sprintf-js": "^1.1.1"
   },
   "devDependencies": {
-    "mocha": "~5.2.0",
-    "chai": "~4.1.2",
-    "chai-as-promised": "~7.1.1",
-    "sinon": "~6.0.0",
-    "mockery": "~2.1.0"
+    "mocha": "^5.2.0",
+    "chai": "^4.1.2",
+    "chai-as-promised": "^7.1.1",
+    "sinon": "^6.3.3",
+    "mockery": "^2.1.0"
   }
 }