style: add prettier and eslint (#328)

* style: execute prettier on all code files
build: add prettier to devDependencies

* refactor: var to const/let

* build: add simple eslint config & packages

* refactor: optimize re-export of "is-ip"

* refactor: optimize re-export of "is-ip"

* chore: update eslint config

* style: execute prettier on all code files
chore: update prettier config

* build: remove eslint-plugin-prettier

* chore: add editorconfig

* chore: update npm eslint script and cleanup eslint config file

.editorconfig

@@ -0,0 +1,9 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+indent_style = space
+indent_size = 2

.prettierrc

@@ -0,0 +1,10 @@
+{
+  "bracketSpacing": false,
+  "printWidth": 80,
+  "semi": true,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "none",
+  "useTabs": false,
+  "arrowParens": "always"
+}

eslint.config.mjs

@@ -0,0 +1,9 @@
+import js from '@eslint/js';
+import mocha from 'eslint-plugin-mocha';
+export default [
+  mocha.configs.flat.recommended,
+  {
+    ...js.configs.recommended,
+    files: ['**/*.js']
+  }
+];

index.js

@@ -1,2 +1,2 @@
-import fn from "./lib/http.js";
+import fn from './lib/http.js';
 export default fn;