chore: bump dependencies in package.json and package-lock.json

Author: harshithad0703

package-lock.json

@@ -100,10 +100,10 @@
     "webpack-node-externals": "^3.0.0"
   },
   "dependencies": {
-    "@contentstack/utils": "^1.3.18",
-    "@fetch-mock/jest": "^0.2.12",
+    "@contentstack/utils": "^1.3.20",
+    "@fetch-mock/jest": "^0.2.15",
     "es6-promise": "^4.2.8",
-    "fetch-mock": "^12.4.0",
+    "fetch-mock": "^12.5.2",
     "localStorage": "1.0.4",
     "qs": "^6.14.0"
   }