feat: add cache option (options.cache) (#86)

README.md

@@ -37,15 +37,16 @@ module.exports = {
 
 |Name|Type|Default|Description|
 |:--:|:--:|:-----:|:----------|
-|**`test`**|`{RegExp\|Array<RegExp>}`|`.`|All assets matching this `{RegExp\|Array<RegExp>}` are processed|
-|**`include`**|`{RegExp\|Array<RegExp>}`|`undefined`|Files to `include`|
-|**`exclude`**|`{RegExp\|Array<RegExp>}`|`undefined`|Files to `exclude`|
-|**`asset`**|`{String}`|`[path].gz[query]`|The target asset name. `[file]` is replaced with the original asset. `[path]` is replaced with the path of the original asset and `[query]` with the query|
-|**`filename`**|`{Function}`|`false`|A `{Function}` `(asset) => asset` which receives the asset name (after processing `asset` option) and returns the new asset name|
-|**`algorithm`**|`{String\|Function}`|`gzip`|Can be `(buffer, cb) => cb(buffer)` or if a `{String}` is used the algorithm is taken from `zlib`|
-|**`threshold`**|`{Number}`|`0`|Only assets bigger than this size are processed. In bytes.|
-|**`minRatio`**|`{Number}`|`0.8`|Only assets that compress better than this ratio are processed|
-|**`deleteOriginalAssets`**|`{Boolean}`|`false`|Whether to delete the original assets or not|
+|**[`test`](#test)**|`{RegExp\|Array<RegExp>}`|`.`|All assets matching this `{RegExp\|Array<RegExp>}` are processed|
+|**[`include`](#include)**|`{RegExp\|Array<RegExp>}`|`undefined`|Files to `include`|
+|**[`exclude`](#exclude)**|`{RegExp\|Array<RegExp>}`|`undefined`|Files to `exclude`|
+|**[`cache`](#cache)**|`{Boolean\|String}`|`false`|Enable file caching|
+|**[`asset`](#asset)**|`{String}`|`[path].gz[query]`|The target asset name. `[file]` is replaced with the original asset. `[path]` is replaced with the path of the original asset and `[query]` with the query|
+|**[`filename`](#filename)**|`{Function}`|`false`|A `{Function}` `(asset) => asset` which receives the asset name (after processing `asset` option) and returns the new asset name|
+|**[`algorithm`](#algorithm)**|`{String\|Function}`|`gzip`|Can be `(buffer, cb) => cb(buffer)` or if a `{String}` is used the algorithm is taken from `zlib`|
+|**[`threshold`](#threshold)**|`{Number}`|`0`|Only assets bigger than this size are processed. In bytes.|
+|**[`minRatio`](#minratio)**|`{Number}`|`0.8`|Only assets that compress better than this ratio are processed|
+|**[`deleteOriginalAssets`](#deleteoriginalassets)**|`{Boolean}`|`false`|Whether to delete the original assets or not|
 
 ### `test`
 
@@ -80,6 +81,17 @@ module.exports = {
 ]
 ```
 
+### `cache`
+
+**webpack.config.js**
+```js
+[
+  new CompressionPlugin({
+    cache: true
+  })
+]
+```
+
 ### `asset`
 
 **webpack.config.js**