Update dependency prettier to v2.6.1

Author: renovate-bot

package-lock.json

@@ -68,7 +68,7 @@
     "jest": "26.2.2",
     "jest-jasmine2": "~25.2.0",
     "jest-preset-angular": "~8.1.2",
-    "prettier": "2.1.2",
+    "prettier": "2.6.1",
     "ts-jest": "26.4.0",
     "ts-node": "~7.0.0",
     "tslint": "~6.0.0",