Update vlc to 3.0.6

[yurikoles]

After making all changes to the cask:

• brew cask audit --download {{cask_file}} is error-free.
• brew cask style --fix {{cask_file}} left no offenses.
• The commit message includes the cask’s name and version.

[core-code]

thanks!

i was thinking about changing the appcast stanza since their current plan is to keep the appcast outdated:
https://trac.videolan.org/vlc/ticket/20382
https://trac.videolan.org/vlc/ticket/21643

should we change it e.g. to
http://download.videolan.org/pub/videolan/vlc/
?

[yurikoles]

should we change it e.g. to
http://download.videolan.org/pub/videolan/vlc/
?

My Cappuccino.app don't see feed there.

[core-code]

technically there is no feed there, its just a website.

[trss]

How do I resolve the following error?

Error: Cask 'vlc' definition is invalid: invalid 'depends_on macos' value: ":lion"

I'm on macOS 10.13.4 High Sierra with Xcode 9.4.1.

[vitorgalvao]

@trss #58046

[trss]

Thanks! Worked a treat. Somehow didn't turn up when googling the error.