added application/x.ms.shortcut application/x.apple.alias info to readme

readme.md

@@ -216,8 +216,8 @@ Type: [`stream.Readable`](https://nodejs.org/api/stream.html#stream_class_stream
 - [`ics`](https://en.wikipedia.org/wiki/ICalendar#Data_format) - iCalendar
 - [`glb`](https://github.com/KhronosGroup/glTF) - GL Transmission Format
 - [`pcap`](https://wiki.wireshark.org/Development/LibpcapFileFormat) - Libpcap File Format
-- [`lnk`](https://en.wikipedia.org/wiki/Shortcut_%28computing%29#Microsoft_Windows) - Microsoft Windows file shortcut
-- [`alias`](https://en.wikipedia.org/wiki/Alias_%28Mac_OS%29) - macOS Alias file
+- [`lnk`](https://en.wikipedia.org/wiki/Shortcut_%28computing%29#Microsoft_Windows) - Microsoft Windows file shortcut, assigned MIME `application/x.ms.shortcut`
+- [`alias`](https://en.wikipedia.org/wiki/Alias_%28Mac_OS%29) - macOS Alias file, assigned MIME `application/x.apple.alias`
 
 *SVG isn't included as it requires the whole file to be read, but you can get it [here](https://github.com/sindresorhus/is-svg).*