restore prettier's arrowParens to the default value, which is "always" in prettier v2.0+

Author: falkenhawk

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@ovos-media/coding-standard",
-  "version": "1.4.1",
+  "version": "1.4.2",
   "description": "ovos-media Coding Standard",
   "main": "index.js",
   "types": "index.d.ts",

prettier.ts

@@ -10,10 +10,6 @@ const config: prettier.Options = {
   printWidth: 100,
   singleQuote: true,
   trailingComma: "es5",
-  // neither "avoid" nor "always" plays well with tslint's "ter-arrow-parens"
-  // with "as-needed" + "requireForBlockBody": true...
-  // but of two evils, choose the least (disable requireForBlockBody in tslint)
-  arrowParens: "avoid",
 };
 
 export default config;