Merge pull request #419 from line/renovate/prettier-2.x

chore(deps): update dependency prettier to v2.8.3

Author: renovate[bot]

package-lock.json

@@ -53,7 +53,7 @@
     "mocha": "10.2.0",
     "nock": "13.3.0",
     "nyc": "15.1.0",
-    "prettier": "2.8.2",
+    "prettier": "2.8.3",
     "ts-node": "10.9.1",
     "typescript": "3.9.10",
     "vuepress": "1.9.8"