Add "Show Extensions Updates" command

[akamud]

Shows all installed extensions that have updates available. Can also be accessed by "ext update". This is how it looks like:

It is showing just the extensions that are outdated.

I miss this feature, what does the team think about this?

[msftclas]

Hi @akamud, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!

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[msftclas]

@akamud, Thanks for signing the contribution license agreement so quickly! Actual humans will now validate the agreement and then evaluate the PR.

Thanks, MSBOT;

[joaomoreno]

Closed and opened PR to get a later merge commit for Travis to build on and get this green.

[msftclas]

Hi @akamud, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!
You've already signed the contribution license agreement. Thanks!

The agreement was validated by Microsoft and real humans are currently evaluating your PR.

TTYL, MSBOT;

[msftclas]

Hi @akamud, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!
You've already signed the contribution license agreement. Thanks!

The agreement was validated by Microsoft and real humans are currently evaluating your PR.

TTYL, MSBOT;

[joaomoreno]

Once again...

[joaomoreno]

@akamud fyi I added a couple more commits on top:

• 386a130: use semver to compare the versions
• 8572f72: rename ExtensionsUpdates to OutdatedExtensions

Overall, great job and thanks! 👍

[akamud]

Awesome!