theory/semver/#2: Semantic VersioningVersion 2

[hoppfrosch]

This commits are implementing #2

One thing I was not sure how to implement (not a technical problem - but I couldn't decide whats the correct implementation):
Versionstrings with NO Hyphen between Version and PreRelease are NO longer accepted as valid SemVers (see 9. in http://semver.org/spec/v2.0.0.html) - as Hyphens are required according specification to separate Version from PreRelease. In SemVer 1.0 no Hyphen was required (see 4.) in http://semver.org/spec/v1.0.0.html). (Versionstrings like 1.2.3b are NO longer valid SemVer now)
This is kind of inconsequent, as the Versionpart according to 2.) http://semver.org/spec/v2.0.0.html has to be in form "X.Y.Z" - but the current implementation still accepts incomplete versions like "1" or "1.0" ("X.Y.Z" was already required by http://semver.org/spec/v1.0.0.html Point 2.) - but your implementation already does not consider this)

I adapted the tests to reflect the changes from SemVer 1.0 to 2.0

[theory]

Thank you! Would you take a look at fixing the failures on older Perls?

[hoppfrosch]

Done :-)

Remark: I added unittests to verify the implementation against specification (used extended ordering example from http://semver.org/spec/v2.0.0.html - Point 11 )

[hoppfrosch]

Are there any specific reasons you don't accept my pull request?

[theory]

Only a lack of time!

[theory]

Looks like you removed the ability for declare() to upgrade semver 1.0.0-beta versions to v2.0.0 semvers. For example, you commented out the testing of 1.2.02b and the like. Can you restore those, just for declare(), so that we have a bit more backward compatibility?

[theory]

Also, looking at a couple of issues we had with pg-semver, there's theory/pg-semver#19, which covers metadata appearing after a plus (+), and theory/pg-semver#23, which covers some of the formatting and sort ordering of metadata.

[theory]

Hrm, I removed the merge, but this issue isn't updating. :-( Might have to open a new PR after addressing the issues above. Sorry about that.

[hoppfrosch]

Hi theory,

after you have merged now: are there still open things I have to/should do/fix?

[theory]

Yeah, but I'll do the merge again and you can work from that. Then there's this.