HTTP error should be status code in readme.md (#303)

HTTP `error` should be `status` code in `readme.md`

readme.md

@@ -184,7 +184,7 @@ module.exports = async (req, res) => {
 ##### `send(res, statusCode, data = null)`
 
 - Use `require('micro').send`.
-- `statusCode` is a `Number` with the HTTP error code, and must always be supplied.
+- `statusCode` is a `Number` with the HTTP status code, and must always be supplied.
 - If `data` is supplied it is sent in the response. Different input types are processed appropriately, and `Content-Type` and `Content-Length` are automatically set.
   - `Stream`: `data` is piped as an `octet-stream`. Note: it is _your_ responsibility to handle the `error` event in this case (usually, simply logging the error and aborting the response is enough).
   - `Buffer`: `data` is written as an `octet-stream`.