* feat: allow getPreviewLinkData for all links
Only YouTube links were supported in `getPreviewLinkData` previously.
Now, any whitelisted links can have their data retreived using this function, returning the true content type (by examining the header bytes of the content).
feat: add tenor.com and giphy.com to whitelisted urls list
* Fix json format
* bump VERSION
* Lint urls.go
Co-authored-by: Andrea Maria Piana <andrea.maria.piana@gmail.com>