Allow non-ASCII filename by default. Rework of #1148

[shuhei]

BREAKING CHANGE: Allowing non-ASCII filename by default.

This is a rework of #1148 by @yalab.

[thomasfedb]

LGTM ✨

@bensie Is it possible to either get master passing on Travis, or determine if CI failures in this build are related to the changes in this PR.

[bensie]

@thomasfedb I think there was a problem with Travis when this ran initially, re-running seems to be working fine. There is an issue with the rails-master Gemfile (Rails 5), but this PR isn't affecting that.

This looks great, thanks @shuhei!

[shuhei]

@bensie @thomasfedb Thanks for reviewing and merging!

[shuhei]

@bensie Is there any change that this is gonna be released in the near future?

[thomasfedb]

@shuhei This will be included in the 1.0.0 release, which there isn't a defined timeline for quite yet.

[shuhei]

@thomasfedb I understand that this should be in a major upgrade because it breaks the current default. Thanks for all your effort for keeping this great library working!