Update dependency prettier to v2.8.4

Author: renovate[bot]

package.json

@@ -46,7 +46,7 @@
 		"eslint-config-prettier": "8.5.0",
 		"eslint-plugin-functional": "4.2.0",
 		"husky": "7.0.4",
-		"prettier": "2.6.0",
+		"prettier": "2.8.4",
 		"rimraf": "3.0.2",
 		"sinon": "13.0.1",
 		"ts-mock-imports": "1.3.8",

yarn.lock

@@ -7710,10 +7710,10 @@ prepend-http@^2.0.0:
   resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-2.0.0.tgz#e92434bfa5ea8c19f41cdfd401d741a3c819d897"
   integrity sha1-6SQ0v6XqjBn0HN/UAddBo8gZ2Jc=
 
-prettier@2.6.0:
-  version "2.6.0"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.6.0.tgz#12f8f504c4d8ddb76475f441337542fa799207d4"
-  integrity sha512-m2FgJibYrBGGgQXNzfd0PuDGShJgRavjUoRCw1mZERIWVSXF0iLzLm+aOqTAbLnC3n6JzUhAA8uZnFVghHJ86A==
+prettier@2.8.4:
+  version "2.8.4"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.8.4.tgz#34dd2595629bfbb79d344ac4a91ff948694463c3"
+  integrity sha512-vIS4Rlc2FNh0BySk3Wkd6xmwxB0FpOndW5fisM5H8hsZSxU2VWVB5CWIkIjWvrHjIhxk2g3bfMKM87zNTrZddw==
 
 prettier@^2.1.2:
   version "2.4.1"