chore(package): update prettier to version 2.0.5

Closes #10

Author: greenkeeper[bot]

package.json

@@ -49,7 +49,7 @@
     "eslint-plugin-react": "^7.14.3",
     "jest": "^24.7.1",
     "parcel-bundler": "^1.12.3",
-    "prettier": "^1.18.2",
+    "prettier": "^2.0.5",
     "react": "^16.8.6",
     "react-dom": "^16.8.6",
     "react-test-renderer": "^16.8.6",