rename script compile to build and add it to prepublish script

package.json

   "version": "2.12.1",
   "homepage": "https://github.com/react-native-community/react-native-webview#readme",
   "scripts": {
-    "compile": "tsc",
+    "prebuild": "rimraf lib",
+    "prepare": "yarn run build",
+    "build": "tsc",
     "ci:publish": "yarn semantic-release",
-    "ci:test": "yarn ci:test:compile",
-    "ci:test:compile": "yarn compile",
+    "ci:test": "yarn ci:test:build",
+    "ci:test:build": "yarn build",
     "semantic-release": "semantic-release"
   },
   "peerDependencies": {
     "@types/react": "^16.4.18",
     "@types/react-native": "^0.57.6",
     "react-native": "^0.57",
+    "rimraf": "^2.6.2",
     "semantic-release": "15.10.3",
     "typescript": "^3.1.6"
   },

src/index.ts

 
 declare var _test1: typeof IOSWebView;
 declare var _test2: typeof AndroidWebView;
+console.log('_test1', _test1)
+console.log('_test2', _test2)
 
 /// export to get the shape of the module
 export default { WebView: IOSWebView}