Fixed repo url (#6)

* Fixed repo url

Changed repository url in order to create link from npm to github

* Update package.json

Author: kurtsergey

package.json

@@ -3,10 +3,7 @@
   "version": "1.0.2",
   "description": "React Native for Web implementation of react-native-linear-gradient",
   "main": "src/index.js",
-  "repository": {
-    "type": "git",
-    "url": "git@github.com:react-native-web-community/react-native-web-linear-gradient.git"
-  },
+  "repository": "https://github.com/react-native-web-community/react-native-web-linear-gradient",
   "author": {
     "name": "Louis Lagrange",
     "email": "lagrange.louis@gmail.com",