update-properties: resolve new versions in parallel

[delanym]

Running a goal like versions:update-properties -Dincludes=*:* takes for ages with many dependencies.
Please allow resolving these in parallel like Maven would do itself.

[andrzejj0]

PRs are welcome.

[slawekjaranowski]

@andrzejj0 - Does this #1207 resolve it?

[andrzejj0]

@andrzejj0 - Does this #1207 resolve it?

I will check when I have time.

[andrzejj0]

No, #1207 does not resolve this. That PR updates UseLatestVersionVersionsMojoBase where it parallelises the process of finding updates for versions; property updates use different logic.