Update dependency prettier to v2

Author: renovate-bot

package.json

@@ -86,7 +86,7 @@
     "postcss-combine-duplicated-selectors": "8.1.0",
     "postcss-custom-properties": "8.0.11",
     "postcss-remove-root": "0.0.2",
-    "prettier": "1.19.1",
+    "prettier": "2.0.1",
     "react": "16.13.1",
     "react-ace": "7.0.5",
     "react-dom": "16.13.1",