Update dependency prettier to v2.6.0

Author: renovate-bot

package.json

@@ -69,7 +69,7 @@
     "japa": "3.1.1",
     "mocha": "8.4.0",
     "np": "7.5.0",
-    "prettier": "2.3.0",
+    "prettier": "2.6.0",
     "rimraf": "3.0.2",
     "ts-node": "10.0.0",
     "typescript": "4.3.2"