chore(package): update flow-copy-source to version 2.0.0 (#78)

Author: greenkeeper[bot]

package.json

@@ -104,7 +104,7 @@
     "eslint": "^4.19.1",
     "eslint-config-insilico": "^5.2.0",
     "flow-bin": "^0.73.0",
-    "flow-copy-source": "^1.3.0",
+    "flow-copy-source": "^2.0.0",
     "husky": "^0.14.3",
     "intersection-observer": "^0.5.0",
     "jest": "^22.4.3",