chore(compression): update readme docs

packages/compression/readme.md

@@ -1,4 +1,4 @@
-# @polka/compression [![npm](https://badgen.now.sh/npm/v/@polka/compression)](https://npmjs.org/package/@polka/compression)
+# @polka/compression [![npm](https://badgen.now.sh/npm/v/@polka/compression)](https://npmjs.org/package/@polka/compression) [![licenses](https://licenses.dev/b/npm/%40polka%2Fcompression)](https://licenses.dev/npm/%40polka%2Fcompression)
 
 > An HTTP response compression middleware that supports native Gzip and Brotli. Works with [Polka][polka] and Express!
 
@@ -28,51 +28,55 @@ polka()
 
 ## API
 
-The `compression(options)` function returns a polka/express -style middleware of the form `(req, res, next)`.
+### `compression(options?: Options): Middlware`
 
-### Options
+The `compression` function creates a Polka/Express-compatible middleware function. When no [`options`](#options) are defined, the defaults are used.
 
- * @param {number} [options.threshold = 1024] Don't compress responses below this size (in bytes)
- * @param {number} [options.level = -1] Gzip/Brotli compression effort (1-11, or -1 for default)
- * @param {boolean} [options.brotli = false] Generate and serve Brotli-compressed responses
- * @param {boolean} [options.gzip = true] Generate and serve Gzip-compressed responses
- * @param {RegExp} [options.mimes] Regular expression of response MIME types to compress (default: text|javascript|json|xml)
 
-#### threshold
+## Options
+
+All options use a default value when a value is not defined.
+
+#### options.threshold
 Type: `Number`<br>
 Default: `1024`
 
 Responses below this threshold (in bytes) are not compressed. The default value of `1024` is recommended, and avoids sharply diminishing compression returns.
 
-#### level
+#### options.level
 Type: `Number`<br>
 Default: `-1`
 
-The compression effort/level/quality setting, used by both Gzip and Brotli. The scale ranges from 1 to 11, where lower values are faster and higher values produce smaller output. The default value of `-1` uses the default compression level as defined by Gzip (6) and Brotli (6).
+The compression effort/level/quality setting, used by both Gzip and Brotli. The scale ranges from `1` to `11`, where lower values are faster and higher values produce smaller output.
+
+The default value of `-1` uses the default compression level as defined by Gzip (`6`) and Brotli (`6`).
 
-#### brotli
+#### options.brotli
 Type: `boolean`<br>
 Default: `false`
 
-Enables response compression using Brotli for requests that support it. This is not enabled by default because Brotli incurs more performance overhead than Gzip.
+Enables response compression using Brotli for requests that support it.
 
-#### gzip
+Brotli incurs more performance overhead than Gzip, which is why it's not enabled by default.
+
+#### options.gzip
 Type: `boolean`<br>
 Default: `true`
 
 Enables response compression using Gzip for requests that support it, as determined by the `Accept-Encoding` request header.
 
-#### mimes
+#### options.mimes
 Type: `RegExp`<br>
 Default: `/text|javascript|\/json|xml/i`
 
 The `Content-Type` response header is evaluated against this Regular Expression to determine if it is a MIME type that should be compressed.
-Remember that compression is generally only effective on textual content.
+
+> **NOTE:** Remember that compression is (generally) only effective on textual content.
 
 
 ## Support
 
-Any issues or questions can be sent to the [Polka][polka] repo, but please specify that you are using `@polka/compression`.
+Any issues or questions can be sent to the [Polka][polka] repository.<br>However, please specify that your inquiry is about `@polka/compression` specifically.
 
 
 ## License