refactor: drop tests for webpack@4

Author: cap-Bernardito

.github/workflows/nodejs.yml

@@ -56,7 +56,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
         node-version: [10.x, 12.x, 14.x]
-        webpack-version: [4, latest]
+        webpack-version: [latest]
 
     runs-on: ${{ matrix.os }}
 

README.md

@@ -139,98 +139,6 @@ module.exports = {
 };
 ```
 
-### `cache`
-
-> ⚠ Ignored in webpack 5! Please use https://webpack.js.org/configuration/other-options/#cache.
-
-Type: `Boolean|String`
-Default: `true`
-
-Enable file caching.
-Default path to cache directory: `node_modules/.cache/html-minimizer-webpack-plugin`.
-
-> ℹ️ If you use your own `minify` function please read the `minify` section for cache invalidation correctly.
-
-#### `Boolean`
-
-Enable/disable file caching.
-
-**webpack.config.js**
-
-```js
-module.exports = {
-  optimization: {
-    minimize: true,
-    minimizer: [
-      new HtmlMinimizerPlugin({
-        cache: true,
-      }),
-    ],
-  },
-};
-```
-
-#### `String`
-
-Enable file caching and set path to cache directory.
-
-**webpack.config.js**
-
-```js
-module.exports = {
-  optimization: {
-    minimize: true,
-    minimizer: [
-      new HtmlMinimizerPlugin({
-        cache: 'path/to/cache',
-      }),
-    ],
-  },
-};
-```
-
-### `cacheKeys`
-
-> ⚠ Ignored in webpack 5! Please use https://webpack.js.org/configuration/other-options/#cache.
-
-Type: `Function<(defaultCacheKeys, file) -> Object>`
-Default: `defaultCacheKeys => defaultCacheKeys`
-
-Allows you to override default cache keys.
-
-Default cache keys:
-
-```js
-({
-  htmlMinimizer: require('html-minifier-terser/package.json').version, // html-minifier-terser version
-  'html-minimizer-webpack-plugin': require('../package.json').version, // plugin version
-  'html-minimizer-webpack-plugin-options': this.options, // plugin options
-  nodeVersion: process.version, // Node.js version
-  assetName: file, // asset path
-  contentHash: crypto.createHash('md4').update(input).digest('hex'), // source file hash
-});
-```
-
-**webpack.config.js**
-
-```js
-module.exports = {
-  optimization: {
-    minimize: true,
-    minimizer: [
-      new HtmlMinimizerPlugin({
-        cache: true,
-        cacheKeys: (defaultCacheKeys, file) => {
-          defaultCacheKeys.myCacheKey = 'myCacheKeyValue';
-
-          return defaultCacheKeys;
-        },
-      }),
-    ],
-  },
-};
-```
-
 ### `parallel`
 
 Type: `Boolean|Number`

jest.config.js

@@ -1,4 +1,3 @@
 module.exports = {
   testEnvironment: 'node',
-  snapshotResolver: './test/helpers/snapshotResolver.js',
 };