Bump Ladda to v2

Author: ggregoire

package.json

@@ -26,7 +26,7 @@
   },
   "homepage": "https://github.com/jsdir/react-ladda#readme",
   "dependencies": {
-    "ladda": "^1.0.0",
+    "ladda": "^2.0.0",
     "prop-types": "^15.5.8"
   },
   "devDependencies": {