Relax bundler dependency to >= 1.3.0

[rymai]

Closes #34.

[AlexWayfer]

Please, don't relax this way. You may not what changes the 3 version will include. For example: rubygems/bundler#694

I recommend to use something like '>= 1.3.0', '< 3'

[rymai]

Please, don't relax this way. You may not what changes the 3 version will include. For example: bundler/bundler#694

I recommend to use something like '>= 1.3.0', '< 3'

You're right, I mimicked what Rails does but it's not the same use case here.

[rymai]

@AlexWayfer FYI guard-bundler 2.2.1 has been released with this bundler restriction.

[AlexWayfer]

@AlexWayfer FYI guard-bundler 2.2.1 has been released with this bundler restriction.

Thank you!