Update dependency prettier to v2.8.4 (#1065)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -94,7 +94,7 @@
     "mocha-eslint": "7.0.0",
     "npm-run-all": "4.1.5",
     "nyc": "15.1.0",
-    "prettier": "2.8.3",
+    "prettier": "2.8.4",
     "qunit": "2.19.4",
     "release-it": "14.14.3",
     "release-it-lerna-changelog": "4.0.1",

yarn.lock

@@ -13185,7 +13185,12 @@ prettier-linter-helpers@^1.0.0:
   dependencies:
     fast-diff "^1.1.2"
 
-[email protected], prettier@^2.5.1:
+[email protected]:
+  version "2.8.4"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.8.4.tgz#34dd2595629bfbb79d344ac4a91ff948694463c3"
+  integrity sha512-vIS4Rlc2FNh0BySk3Wkd6xmwxB0FpOndW5fisM5H8hsZSxU2VWVB5CWIkIjWvrHjIhxk2g3bfMKM87zNTrZddw==
+
+prettier@^2.5.1:
   version "2.8.3"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.8.3.tgz#ab697b1d3dd46fb4626fbe2f543afe0cc98d8632"
   integrity sha512-tJ/oJ4amDihPoufT5sM0Z1SKEuKay8LfVAMlbbhnnkvt6BUserZylqo2PN+p9KeljLr0OHa2rXHU1T8reeoTrw==