add prettier dependency

Author: RyanHirsch

.prettierrc

@@ -0,0 +1,8 @@
+{
+  "trailingComma": "none",
+  "semi": false,
+  "printWidth": 120,
+  "singleQuote": true,
+  "jsxSingleQuote": true,
+  "arrowParens": "always"
+}

package.json

@@ -113,6 +113,7 @@
     "@types/validator": "12.0.1",
     "koa2-swagger-ui": "2.15.4",
     "nodemon": "2.0.1",
+    "prettier": "^2.5.1",
     "ts-node": "8.5.4",
     "typescript": "3.9.7",
     "webpack-cli": "3.3.10"

yarn.lock

@@ -7848,6 +7848,11 @@ prepend-http@^1.0.1:
   resolved "https://registry.yarnpkg.com/prepend-http/-/prepend-http-1.0.4.tgz#d4f4562b0ce3696e41ac52d0e002e57a635dc6dc"
   integrity sha1-1PRWKwzjaW5BrFLQ4ALlemNdxtw=
 
+prettier@^2.5.1:
+  version "2.5.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.5.1.tgz#fff75fa9d519c54cf0fce328c1017d94546bc56a"
+  integrity sha512-vBZcPRUR5MZJwoyi3ZoyQlc1rXeEck8KgeC9AwwOn+exuxLxq5toTRDTSaVrXHxelDMHy9zlicw8u66yxoSUFg==
+
 pretty-format@^25.2.1, pretty-format@^25.5.0:
   version "25.5.0"
   resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-25.5.0.tgz#7873c1d774f682c34b8d48b6743a2bf2ac55791a"