docs: make minor edits to the Arguments section of the documentation (

#568)

I found these somewhat distracting and figured I might as well clean the
documentation up a bit:

- give all arguments the same format
- correct spelling for `separately` and `yourself`
- remove extra whitespace in sentence


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Documentation**
  - Updated README.md formatting for the `request()` method
  - Enhanced argument descriptions with consistent asterisk styling
- Improved documentation readability without changing method
functionality

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

README.md

@@ -62,17 +62,17 @@ console.log('status: %s, body size: %d, headers: %j', res.status, data.length, r
   - ***files*** {Array<ReadStream|Buffer|String> | Object | ReadStream | Buffer | String - The files will send with `multipart/form-data` format, base on `formstream`. If `method` not set, will use `POST` method by default.
   - ***contentType*** String - Type of request data. Could be `json` (**Notes**: not use `application/json` here). If it's `json`, will auto set `Content-Type: application/json` header.
   - ***dataType*** String - Type of response data. Could be `text` or `json`. If it's `text`, the `callback`ed `data` would be a String. If it's `json`, the `data` of callback would be a parsed JSON Object and will auto set `Accept: application/json` header. Default `callback`ed `data` would be a `Buffer`.
-  - **fixJSONCtlChars** Boolean - Fix the control characters (U+0000 through U+001F) before JSON parse response. Default is `false`.
+  - ***fixJSONCtlChars*** Boolean - Fix the control characters (U+0000 through U+001F) before JSON parse response. Default is `false`.
   - ***headers*** Object - Request headers.
-  - ***timeout*** Number | Array - Request timeout in milliseconds for connecting phase and response receiving phase. Default is `5000`. You can use `timeout: 5000` to tell urllib use same timeout on two phase or set them seperately such as `timeout: [3000, 5000]`, which will set connecting timeout to 3s and response 5s.
-  - **keepAliveTimeout** `number | null` - Default is `4000`, 4 seconds - The timeout after which a socket without active requests will time out. Monitors time between activity on a connected socket. This value may be overridden by *keep-alive* hints from the server. See [MDN: HTTP - Headers - Keep-Alive directives](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Keep-Alive#directives) for more details.
+  - ***timeout*** Number | Array - Request timeout in milliseconds for connecting phase and response receiving phase. Default is `5000`. You can use `timeout: 5000` to tell urllib use same timeout on two phase or set them separately such as `timeout: [3000, 5000]`, which will set connecting timeout to 3s and response 5s.
+  - ***keepAliveTimeout*** `number | null` - Default is `4000`, 4 seconds - The timeout after which a socket without active requests will time out. Monitors time between activity on a connected socket. This value may be overridden by *keep-alive* hints from the server. See [MDN: HTTP - Headers - Keep-Alive directives](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Keep-Alive#directives) for more details.
   - ***auth*** String - `username:password` used in HTTP Basic Authorization.
   - ***digestAuth*** String - `username:password` used in HTTP [Digest Authorization](https://en.wikipedia.org/wiki/Digest_access_authentication).
   - ***followRedirect*** Boolean - follow HTTP 3xx responses as redirects. defaults to true.
   - ***maxRedirects*** Number - The maximum number of redirects to follow, defaults to 10.
-  - ***formatRedirectUrl*** Function - Format the redirect url by your self. Default is `url.resolve(from, to)`.
+  - ***formatRedirectUrl*** Function - Format the redirect url by yourself. Default is `url.resolve(from, to)`.
   - ***beforeRequest*** Function - Before request hook, you can change every thing here.
-  - ***streaming*** Boolean - let you get the `res` object when request  connected, default `false`. alias `customResponse`
+  - ***streaming*** Boolean - lets you get the `res` object when request connected, default `false`. alias `customResponse`
   - ***compressed*** Boolean - Accept `gzip, br` response content and auto decode it, default is `false`.
   - ***timing*** Boolean - Enable timing or not, default is `true`.
   - ***socketPath*** String | null - request a unix socket service, default is `null`.