Add flags as an alternative to '*' to update all

[filmor]

Bash will parse the '*' on the shell level which results in a strange experience for everyone not familiar with it when trying to update all packages.

This adds -a and --all as alternatives.

[chawyehsu]

I vote 👍 for this, scoop update */scoop cache rm */scoop cleanup * is really a bad usage in git-bash/msys (and I don't know why all the rest commands of scoop are designed as unix-like command, except for this little * thing. The only reason I can guess is people are too lazy to type -a). I know somebody would tell me to set an alias. But adding this option is not a bad idea.

ps. you should rebase the pull request to the develop branch.

[filmor]

Rebase to the develop branch, any love for this? :)

[Deide]

Having flags is also more powershell-y. so I'm all for that.

[filmor]

Ping?

[ompadu]

I'd also like to support this merge. scoop update "*" isn't that great...

[rashil2000]

Related to #2800