Add PHP 8.1 support

[paxal]

Hi 👋

I'm trying to update my project to PHP 8.1 but it's not compatible due to php_user_filter signature changes in typed properties.

Moreover, there is a modification in PHP 8.1 regarding SJIS I don't know how to address, so I removed the relevant chars from the tests.

Mainly because of 1), this version is only PHP 8.1 compatible (not compatible with PHP 7 nor 8.0)

[ericnorris]

Hey @paxal, thanks for your interest! I'll try to take an in-depth look this weekend.

For what it's worth, I think that due to #1 it's preferable to instead contribute an mbstring equivalent of convert.iconv.* to https://github.com/php/php-src, rather than using this library. I've never been motivated enough to pursue this, however.

[ericnorris]

Hello again @paxal - I've renamed the default branch to main and switched to GitHub Actions instead of Travis CI; do you mind rebasing your change and making the necessary update to the CI workflow?

[ericnorris]

Thanks! I've approved the GitHub actions run, looks like there's a phpunit version upgrade change you'll need to make, since I had to pin to an earlier version for the previous PHP 7 build.

[paxal]

@ericnorris updated ! But still I'l check about convert.iconv.* filters :)

[Karpec]

Hi @ericnorris,
can you release new version with this fix? That would be great!

[ericnorris]

@Karpec done! @paxal thanks again.