Support for Rails 6.1

[yknx4]

Required changes to support Rails 6.1

• Remove deprecated method calls
• Update Gemspec
• Update Travis Config

[jsantos]

@yknx4 Thanks for your contribution! If possible include a description on the PR, and we might also need to add Appraisals support including a gemfiles/rails61.gemfile, which should look like this:

# This file was generated by Appraisal

source "https://rubygems.org"

gem "rails", ">= 6.1.0", "< 6.2"
gem "mysql2", ">= 0.4.4", "< 0.6.0"
gem "pg", ">= 0.18", "< 2.0"
gem "sqlite3", "~> 1.4"

gemspec name: "audited", path: "../"

.travis.yml should also be updated so this new Gemfile would be used on the global test suite.

I was also working on this, so feel free to pick these changes from my WIP commit

[yknx4]

@jsantos on it ~ 👍

[jsantos]

Can any of the maintainers get this merged? I see some builds failing on the CI but these doesn't seem to be consistent... Tried to replicate locally with the same Ruby versions and all was clean. \cc @danielmorrison

[jmeattle]

Much appreciate all your hard work. It would be really great if this PR can be merged soon.

[emileriksson]

Any updates on when this is getting merged??

[anmarchenko]

Is there anything we can do to help to get this merged?

[barrywoolgar]

Is there anything we can do to help to get this merged?

At a guess, managing to get all the CI tests to pass might help. Could be a Travis configuration issue as opposed to a problem with the PR changes, but not sure how that gets debugged without being a maintainer.

[danielmorrison]

Thanks for the work @yknx4! Apologies that I've had zero time to look at this.

Thanks to @jmortlok for fixing the build. I merged a few easy things, and i'll cut a release soon.