Fixed build issue with create-react-app

Author: bietkul

.npmignore

@@ -3,4 +3,4 @@ docs
 .npmignore
 package-lock.json
 yarn.lock
-/src/
+src/

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-reactive-form",
-  "version": "1.0.16",
+  "version": "1.0.20",
   "description": "Angular like Reactive Forms in React",
   "keywords": [
     "forms",
@@ -14,7 +14,7 @@
     "react",
     "react-native"
   ],
-  "main": "src/index.js",
+  "main": "lib/index.js",
   "scripts": {
     "test": "NODE_ENV=test",
     "prepublish": "node_modules/babel-cli/bin/babel.js src --out-dir lib"