feat(package.json): add commitizen and conventional changelog

Author: rishichawda

package-lock.json

@@ -62,6 +62,7 @@
     "chai-enzyme": "^1.0.0-beta.1",
     "cross-env": "^5.2.0",
     "css-loader": "^2.0.2",
+    "cz-conventional-changelog": "^2.1.0",
     "enzyme": "^3.6.0",
     "enzyme-adapter-react-16": "^1.5.0",
     "eslint": "^5.11.0",
@@ -96,5 +97,10 @@
     "react-css-themr": "^2.1.2",
     "react-dom": "^16.3.2",
     "react-icons": "^3.2.2"
+  },
+  "config": {
+    "commitizen": {
+      "path": "./node_modules/cz-conventional-changelog"
+    }
   }
 }