README: add winget as alternative installation method in Windows (#78)

Author: kbdharun

README.md

@@ -35,11 +35,21 @@ $ export PATH=$PATH:$GOBIN
 ```
 
 #### Mac OS
+
 For Mac OS users, there's a [brew formula](https://formulae.brew.sh/formula/virustotal-cli) available. Please note this is not maintained by VirusTotal.
+
 ```sh
 $ brew install virustotal-cli
 ```
 
+#### Windows
+
+For Windows uses, there's a [Winget manifest](https://github.com/microsoft/winget-pkgs/tree/master/manifests/v/VirusTotal/vt-cli) available. Please note this is not maintained by VirusTotal.
+
+```powershell
+winget install VirusTotal.vt-cli
+```
+
 ### A note on Window's console
 
 If you plan to use vt-cli in Windows on a regular basis we highly recommend you to avoid the standard Windows's console and use [Cygwin](https://www.cygwin.com/) instead. The Windows's console is *very* slow when printing large amounts of text (as vt-cli usually does) while Cygwin performs much better. Additionally, you can benefit of Cygwin's support for command auto-completion, a handy feature that Window's console doesn't offer. In order to take advantage of auto-completion make sure to include the `bash-completion` package while installing Cygwin.