Add semver tasks.

[jadb]

No description provided.

[DavertMik]

Nice. Can you explain a bit what is semver executable?
I know of sematic versioning, but what application you are executing with this task?

[jadb]

@DavertMik sure. I am using flazz/semver - there are other executables for sure, this is why it is possible to pass your own semver executable's path.

[jadb]

I realize that other semantic versioning executables might have a different API but that was not accounted for in this release. I can easily see how this can be extended to play well with other APIs but someone would need to provide them to me.

[DavertMik]

It looks pretty useful. But why not have it ported to PHP? Semver is pretty simple.
I'd rather not have a task that depends on a ruby gem.

[jadb]

@DavertMik, as requested (and rightfully so), this task doesn't depend on a ruby gem anymore.

I updated it to use naneau/semver and replicated (only missing format) the gem's API:

• initialize
• increment
• prerelease
• build (metadata)

And like the gem, it uses the .semver filename.

[jadb]

@DavertMik, any plans on making this part of the core?

[jadb]

I accidently purged my local and remote repos that contained those changes... dumb move.

[DavertMik]

Finally I got some time to review it. Sorry for taking that long.
I'm mergin this task, but I will add it to Developent trait, as there are all tasks for dev things.