fix: remove unneeded acorn dependency (#669)

Author: G-Rath

package-lock.json

@@ -52,7 +52,6 @@
     "@azure/arm-storage": "^9.0.1",
     "@azure/ms-rest-nodeauth": "^1.0.1",
     "@azure/storage-blob": "^10.3.0",
-    "acorn": "^7.0.0",
     "axios": "^0.18.0",
     "azure-functions-core-tools": "^3.0.2245",
     "cross-spawn": "^7.0.2",
@@ -81,6 +80,7 @@
     "@types/xml2js": "^0.4.5",
     "@typescript-eslint/eslint-plugin": "^1.9.0",
     "@typescript-eslint/parser": "^1.9.0",
+    "acorn": "^7.0.0",
     "axios-mock-adapter": "^1.16.0",
     "babel-jest": "^24.8.0",
     "babel-preset-react-app": "^9.0.0",