Test against connection_pool 2.x too

[PikachuEXE]

My previous PR #138 allows connection_pool 2.x but did not test against it (I tested it locally with this but forgot to add
Not new release needed just modification to testing
Also updated the size in test case to be sure (since using default value isn't a good test

[benubois]

Hey,

I’m feeling that adding a dependency to test another dependency is too much overhead.

I think that the way you implemented everything is backwards compatible, so is it necessary to test against ~> 2?

If the concern is to keep apnotic from breaking compatibility with 2 in the future, is there a simpler test possible like ensuring splatted args are always passed to ConnectionPool.new?

Thanks again for your work on this!

[PikachuEXE]

If the concern is to keep apnotic from breaking compatibility with 2 in the future, is there a simpler test possible like ensuring splatted args are always passed to ConnectionPool.new?

No idea how to test like this

[PikachuEXE]

What do you think about this PR if I removed the extra dependency appraisal (it's just for easier gemfile generation and local testing

[benubois]

Yeah, if it can be done without the dependency that would be great. Thanks!

[PikachuEXE]

Updated