Update prettier to the latest version 🚀 (#47)

* chore(package): update prettier to version 2.0.0

* chore(package): update lockfile package-lock.json

Co-authored-by: greenkeeper[bot] <23040076+greenkeeper[bot]@users.noreply.github.com>
Co-authored-by: Christoph Werner <[email protected]>

Author: greenkeeper[bot]

package-lock.json

@@ -32,7 +32,7 @@
         "istanbul": "^0.4.5",
         "mocha": "^8.1.1",
         "pre-commit": "^1.2.2",
-        "prettier": "^1.11.1"
+        "prettier": "^2.0.0"
     },
     "scripts": {
         "addCompile": "git add lib/",