Fix beta checks correctly by using gt API

[kratiahuja]

Apparently satisfies does not conform to beta channel checks correctly.

> semver.satisfies('2.13.0-beta.1', '>=2.12.0-beta.1')
false

> semver.gt('2.13.0-beta.1', '2.12.0-beta.1')
true

cc: @rwjblue @danmcclain

[kratiahuja]

Travis is failing. Not sure why. Will need to dig into this.

[rwjblue]

Ya, satisfies is trying to be "safe" with prerelease versions.

[kratiahuja]

@rwjblue I forgot that this PR will introduce a minor regression. Earlier we allowed >=. With this PR we are moving to >. That's why the tests are failing. I see ember-cli-version-checker master has gte method which will make this absolute equivalent.

Is it possible to do a new release of ember-cli-version-checker? If not, then I can update the README to be a bit more explicit.

[rwjblue]

Ya, I can for sure, but you can also switch to beta.0 or alpha.0 for now...

[kratiahuja]

Ohoo yeah I didn't realize that 😄

[kratiahuja]

@rwjblue This is good to merge. Travis is 💚 now. Thanks for your suggestion! 😄

[kellyselden]

@kratiahuja I just published ember-cli-version-checker

[rwjblue]

@danmcclain - have time to release?

[danmcclain]

@rwjblue I can tonight

[kratiahuja]

@danmcclain whenever you release, can you merge this one as well before releasing? #376

[danmcclain]

Published v1.0.0-beta.18