fix(package): update web3 to version 1.2.1

Closes #90

Author: greenkeeper[bot]

package.json

@@ -72,7 +72,7 @@
     "sqlite3": "^4.0.4",
     "typescript": "3.1.6",
     "uuid": "^3.3.2",
-    "web3": "1.0.0-beta.36",
+    "web3": "1.2.1",
     "web3-utils": "^1.0.0-beta.55"
   },
   "devDependencies": {