fix: move @babel/runtime-corejs2 to production dependencies (via #5508)

package.json

@@ -47,6 +47,7 @@
     "start": "npm-run-all --parallel serve-static open-static"
   },
   "dependencies": {
+    "@babel/runtime-corejs2": "^7.5.5",
     "@braintree/sanitize-url": "^2.0.2",
     "@kyleshockey/js-yaml": "^1.0.1",
     "@kyleshockey/object-assign-deep": "^0.4.2",
@@ -91,7 +92,6 @@
     "@babel/preset-env": "^7.0.0",
     "@babel/preset-react": "^7.0.0",
     "@babel/register": "^7.4.4",
-    "@babel/runtime-corejs2": "^7.0.0",
     "@release-it/conventional-changelog": "^1.1.0",
     "autoprefixer": "^8.4.1",
     "babel-eslint": "^9.0.0",