dev: update devDependencies to latest, migrate to eslint.config.js, t…

…est Node 20 in CI

.github/workflows/test.yml

@@ -43,7 +43,7 @@ jobs:
     strategy:
       matrix:
         os: ['ubuntu-latest', 'windows-latest']
-        node: ['14.14.0', '16.0', '18.0']
+        node: ['14.14.0', '16.0', '18.0', '20.0']
     name: Testing Node ${{ matrix.node }} on ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v3

eslint.config.js

@@ -0,0 +1,51 @@
+import js from '@eslint/js'
+import globals from 'globals'
+import prettier from 'eslint-config-prettier'
+import pluginImport from 'eslint-plugin-import'
+import pluginNode from 'eslint-plugin-n'
+
+const config = [
+  {
+    ignores: ['lib'],
+    languageOptions: {
+      globals: {
+        ...globals.node
+      },
+
+      ecmaVersion: 2020,
+      sourceType: 'module'
+    },
+
+    rules: {
+      ...js.configs.recommended.rules,
+      'no-console': 'error',
+      'prefer-const': 'error',
+      'no-var': 'error',
+      'no-use-before-define': 'error',
+      'no-await-in-loop': 'error',
+      'n/exports-style': [0, 'error'],
+      'import/first': 'error',
+      'import/no-anonymous-default-export': 'error',
+      'import/no-unassigned-import': 'error',
+      'import/no-internal-modules': [
+        'error',
+        {
+          allow: ['src/**']
+        }
+      ]
+    },
+    plugins: {
+      import: pluginImport,
+      n: pluginNode,
+      prettier: prettier
+    }
+  },
+  {
+    files: ['test/{**/,}*.js'],
+    languageOptions: {
+      globals: { ...globals.mocha }
+    }
+  }
+]
+
+export default config