style: enable eslint rule no-unused-vars

.eslintrc.js

@@ -16,7 +16,6 @@ module.exports = {
     '@typescript-eslint/prefer-optional-chain': 'off',
     '@typescript-eslint/prefer-includes': 'off',
     '@typescript-eslint/prefer-nullish-coalescing': 'off',
-    '@typescript-eslint/no-unused-vars': 'off',
     '@typescript-eslint/no-dynamic-delete': 'off',
     '@typescript-eslint/no-unused-expressions': 'off',
     '@typescript-eslint/restrict-plus-operands': 'off',
@@ -24,7 +23,6 @@ module.exports = {
     'comma-dangle': ['error', 'only-multiline'],
     'no-mixed-operators': 'off',
     'no-unused-expressions': 'off',
-    'no-unused-vars': 'off',
     eqeqeq: 'off',
     '@typescript-eslint/semi': ['error', 'always'],
     semi: ['error', 'always'],

examples/svg/script.js

@@ -4,8 +4,6 @@ var patch = snabbdom.init([
 ]);
 var h = require('../../h.js').default;
 
-var vnode;
-
 window.addEventListener('DOMContentLoaded', () => {
   var container = document.getElementById('container');
   var vnode = h('div', [
@@ -13,5 +11,5 @@ window.addEventListener('DOMContentLoaded', () => {
       h('circle', { attrs: { cx: 50, cy: 50, r: 40, stroke: 'green', 'stroke-width': 4, fill: 'yellow' } })
     ])
   ]);
-  vnode = patch(container, vnode);
+  patch(container, vnode);
 });

src/jsx-global.ts

@@ -1,4 +1,9 @@
-import { VNode, VNodeData } from './vnode';
+import { VNode as _VNode, VNodeData as _VNodeData } from './vnode';
+
+// workaround
+// https://github.com/typescript-eslint/typescript-eslint/issues/1596
+type VNode = _VNode;
+type VNodeData = _VNodeData;
 
 declare global {
   /**

src/snabbdom.ts

@@ -1,4 +1,3 @@
-/* global module, document, Node */
 import { Module } from './modules/module';
 import vnode, { VNode } from './vnode';
 import * as is from './is';

src/test/jsx.tsx

@@ -1,4 +1,6 @@
 import { assert } from 'chai';
+// workaround linter issue
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
 import { jsx } from '../jsx';
 
 describe('snabbdom', function () {
@@ -182,6 +184,8 @@ describe('snabbdom', function () {
     });
 
     it('works with a function component', function () {
+      // workaround linter issue
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
       const Part = ({ part }: {part: string}) => <span>{part}</span>;
       const vnode = (
         <div>