Support Opium Deposit Scheduler (#62)

* Support Opium Deposit Scheduler

* Fix empty values for deposit scheduler

* Fix gnosis deposit scheduler

Author: tsudmi

subgraphs/stakewise/config/gnosis.json

@@ -36,6 +36,10 @@
     "address": "0x9b23e05aefb37d5ea9b525016d19eb82b65f255c",
     "startBlock": "21293582"
   },
+  "opiumDepositScheduler": {
+    "address": "0x0000000000000000000000000000000000000000",
+    "startBlock": "21584842"
+  },
   "distributorTokens": [
     {
       "index": 0,

subgraphs/stakewise/config/mainnet.json

@@ -36,6 +36,10 @@
     "address": "0xc486c10e3611565f5b38b50ad68277b11c889623",
     "startBlock": "13776571"
   },
+  "opiumDepositScheduler": {
+    "address": "0xe47b867b2b5b21a2022068c9ef1293783864b274",
+    "startBlock": "14108270"
+  },
   "distributorTokens": [
     {
       "index": 0,