Update eslint to 6.6.0

Author: friederbluemle

package.json

@@ -43,7 +43,7 @@
   "devDependencies": {
     "@react-native-community/eslint-config": "0.0.5",
     "babel-core": "^6.26.3",
-    "eslint": "^6.0.1",
+    "eslint": "^6.6.0",
     "flow-bin": "^0.98.0",
     "react": "16.8.6",
     "react-native": "0.60.0"