Bump prettier from 2.6.2 to 2.8.4

Bumps [prettier](https://github.com/prettier/prettier) from 2.6.2 to 2.8.4.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@2.6.2...2.8.4)

---
updated-dependencies:
- dependency-name: prettier
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -28,7 +28,7 @@
     "tp": "bin/cli.js"
   },
   "devDependencies": {
-    "prettier": "2.6.2",
+    "prettier": "2.8.4",
     "tap": "^16.0.1"
   },
   "tap": {