chore(package): update prettier to version 2.0.4

Closes #79

Author: greenkeeper[bot]

package.json

@@ -100,7 +100,7 @@
     "husky": "^4.2.3",
     "jest": "^25.1.0",
     "metro-react-native-babel-preset": "^0.58.0",
-    "prettier": "^1.19.1",
+    "prettier": "^2.0.4",
     "react": "~16.9.0",
     "react-native": "^0.61.5",
     "react-test-renderer": "~16.9.0",