Moved webview to dev dependency

Author: rohanoid5

package.json

@@ -55,8 +55,7 @@
     "cheerio": "^1.0.0-rc.2",
     "commander": "^2.13.0",
     "ejs": "^2.5.7",
-    "mkdirp": "^0.5.1",
-    "react-native-webview": "^5.12.1"
+    "mkdirp": "^0.5.1"
   },
   "devDependencies": {
     "babel-jest": "23.6.0",
@@ -72,7 +71,8 @@
     "metro-react-native-babel-preset": "0.51.1",
     "react": "16.6.3",
     "react-native": "0.57.8",
-    "react-test-renderer": "16.6.3"
+    "react-test-renderer": "16.6.3",
+    "react-native-webview": "^5.12.1"
   },
   "jest": {
     "preset": "react-native"