Update dependency grommet to v2

Author: xcomponentadmin

package.json

@@ -22,7 +22,7 @@
     "@types/react": "^16.0.0",
     "deep-freeze": "0.0.1",
     "es6-promisify": "^6.0.0",
-    "grommet": "^1.1.0",
+    "grommet": "^2.0.0",
     "prop-types": "^15.5.8",
     "react": "^16.0.0",
     "react-dom": "^16.0.0",