Drop support for old Ruby and old Jekyll

[jekyllbot]

PR automatically created for @pathawks.

Drop support for old Ruby and old Jekyll

[ashmaroli]

Jekyll dropped support for Ruby 2.0.x because its dependency Liquid dropped support for Ruby 2.0, Now another dependency (this plugin) is going to force Jekyll to drop support for Ruby 2.1 as well...
In about 5months, Ruby 2.2 will become EOL as well.. perhaps some other dependency may drop support for Ruby 2.2 which would force Jekyll to yield again..

Sad..

[pathawks]

I guess we don't have to drop support for Ruby 2.1, but it is EOL so it seems like everybody should drop support.

[pathawks]

@ashmaroli You do raise a good point though. Because this plugin is required by Jekyll, it's requirements should be no more strict than Jekyll's requirements.

[ashmaroli]

I guess we don't have to drop support for Ruby 2.1

As a matter of fact, you have little choice here now because listen 3.1 has dropped support for Ruby 2.1

[pathawks]

As a matter of fact, you have little choice here now because listen 3.1 has dropped support for Ruby 2.1

Do we need listen 3.1? We don't require it.

[ashmaroli]

We don't require it.

Ah right.. my bad.. I assumed #50 would cause one to depend on Listen 3.1..
We're safe then..

[pathawks]

It allows a later version of Listen, but locking to listen 3.0 still works.

[DirtyF]

@jekyllbot: merge +dev

[ashmaroli]

@DirtyF I believe this wasn't ready for a merge..
we can't have jekyll-watch drop support for Ruby 2.1 which Jekyll still supports..

[DirtyF]

listen is right we should also drop support for Ruby 2.1 it's EOL.

[DirtyF]

amended in b1dd7e7 and opened jekyll/jekyll#6503