Introduce Pretteir

Author: kaorun343

package.json

@@ -25,6 +25,7 @@
     "@types/jest": "^26.0.15",
     "@types/node": "^14.14.9",
     "jest": "^26.6.3",
+    "prettier": "^2.2.1",
     "reflect-metadata": "^0.1.13",
     "rollup": "^2.33.3",
     "ts-jest": "^26.4.4",

yarn.lock

@@ -2905,6 +2905,11 @@ prelude-ls@~1.1.2:
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.1.2.tgz#21932a549f5e52ffd9a827f570e04be62a97da54"
   integrity sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ=
 
+prettier@^2.2.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.2.1.tgz#795a1a78dd52f073da0cd42b21f9c91381923ff5"
+  integrity sha512-PqyhM2yCjg/oKkFPtTGUojv7gnZAoG80ttl45O6x2Ug/rMJw4wcc9k6aaf2hibP7BGVCCM33gZoGjyvt9mm16Q==
+
 pretty-format@^26.0.0, pretty-format@^26.6.2:
   version "26.6.2"
   resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-26.6.2.tgz#e35c2705f14cb7fe2fe94fa078345b444120fc93"