feat: switch to native ESM with exports

Also:
- chore: update devDeps. and lint
- chore: switch to pnpm

.npmignore

@@ -2,3 +2,4 @@ rollup.config.js
 test
 .nyc_output
 coverage
+eslint.config.js

CHANGES.md

@@ -1,11 +1,10 @@
 # CHANGES for `handle-node`
 
-## ?
+## 0.4.0
 
-- Linting: As per latest ash-nazg/ESLint 7
-- npm: Update `rollup-plugin-babel` to `@rollup/plugin-babel`
-- npm: Add missing peer dep.
-- npm: Update devDeps
+- feat: switch to native ESM with exports
+- chore: update devDeps. and lint
+- chore: switch to pnpm
 
 ## 0.3.0
 

README.md

@@ -20,17 +20,17 @@ DOM `NodeIterator`s or `TreeWalker`s.
 
 ## Installation
 
-### With ESM bundler (e.g., Rollup)
+```shell
+npm install handle-node
+```
+
+### Native ESM
 
 ```js
 import handleNode from 'handle-node';
 ```
 
-### Node
-
-```
-npm install handle-node
-```
+### CommonJS
 
 ```js
 const handleNode = require('handle-node');

eslint.config.js

@@ -0,0 +1,47 @@
+import ashNazg from 'eslint-config-ash-nazg';
+
+export default [
+  {
+    ignores: [
+      'dist',
+      'coverage'
+    ]
+  },
+  ...ashNazg(['sauron', 'node']),
+  // Our Markdown rules (and used for JSDoc examples as well, by way of
+  //   our use of `matchingFileName` in conjunction with
+  //   `jsdoc/check-examples` within `ash-nazg`)
+  {
+    files: ['*.md/*.js'],
+    rules: {
+      'eol-last': ['off'],
+      'no-console': ['off'],
+      'no-undef': ['off'],
+      'no-unused-vars': ['off'],
+      'padded-blocks': ['off'],
+      'import/unambiguous': ['off'],
+      'import/no-commonjs': ['off'],
+      'import/no-unresolved': ['off'],
+      'n/no-missing-import': ['error', {
+        allowModules: ['handle-node']
+      }],
+      'n/no-missing-require': ['error', {
+        allowModules: ['handle-node']
+      }]
+    }
+  },
+  {
+    files: ['test/**'],
+    rules: {
+      'chai-expect/missing-assertion': 2,
+      'chai-expect/terminating-properties': 1,
+      'import/unambiguous': 0
+    }
+  },
+  {
+    rules: {
+      // Override these `ash-nazg/sauron` rules which are difficult for us
+      //   to apply at this time
+    }
+  }
+];