add @types/react by itself - fixup w/ 1st commit to PR

Author: agilgur5

package-lock.json

@@ -33,6 +33,7 @@
   "author": "Anton Gilgur",
   "license": "Apache-2.0",
   "devDependencies": {
+    "@types/react": "^15.6.25",
     "babel-core": "^6.0.14",
     "babel-loader": "^6.0.0",
     "babel-preset-es2015": "^6.14.0",