fix(package): update web3 to version 1.2.3

Closes #11

Author: greenkeeper[bot]

package.json

@@ -8,7 +8,7 @@
   "dependencies": {
     "ganache-cli": "6.4.1",
     "truffle": "5.0.11",
-    "web3": "1.0.0-beta.52"
+    "web3": "1.2.3"
   },
   "devDependencies": {
     "chai": "4.2.0",