chore: update prettier setting

Author: iamkun

package.json

@@ -9,7 +9,7 @@
     "test": "TZ=Pacific/Auckland npm run test-tz && TZ=Europe/London npm run test-tz && npm run test-tz && jest",
     "test-tz": "jest test/timezone.test --coverage=false",
     "lint": "./node_modules/.bin/eslint src/* test/* build/*",
-    "prettier": "prettier --write \"{src,test,build,docs}/**/*.{js,ts,md}\"",
+    "prettier": "prettier --write \"docs/**/*.md\"",
     "babel": "cross-env BABEL_ENV=build babel src --out-dir esm --copy-files",
     "build": "cross-env BABEL_ENV=build node build && npm run size",
     "sauce": "npx karma start karma.sauce.conf.js",

prettier.config.js

@@ -1,9 +1,7 @@
 module.exports = {
   useTabs: false,
   printWidth: 80,
-  tabWidth: 2,
   singleQuote: true,
   trailingComma: 'none',
-  semi: false,
-  arrowParens: 'avoid'
+  semi: false
 }