PHP8 incl PHP7.2+

[dereuromark]

Resolves #148

Requires #149 to be released first as last minor of PHP5 support.

WIP for a while
we can add more things here.

Since we do make a major here, we can add typehints.

TODO:

• unskip php8 run in travis matrix.
• Add strict typehints (param and return)
• Cleanup API? Is there anything that could be done in such a major - or deprecations to be removed?
• Fix getSmilies() to getSmileys()

[milesj]

Feel free to migrate this to GitHub Actions/CI if that works better.

[dereuromark]

It looks more like sth PHPUnit9+ related for some reason..

[dereuromark]

Yeah, now its green :) PHP 8 passes.

There was 1 warning:
1) Decoda\DecodaTest::testCustomConfigPath
The @expectedException, @expectedExceptionCode, @expectedExceptionMessage, and @expectedExceptionMessageRegExp annotations are deprecated. They will be removed in PHPUnit 9. Refactor your test to use expectException(), expectExceptionCode(), expectExceptionMessage(), or expectExceptionMessageMatches() instead.

[dereuromark]

Should we merge and release a new minor if all is BC?

[milesj]

@dereuromark Go for it!