Release a new version to address PHP 7.4 issue

[htdat]

Hi 👋,

We're seeing this error with ver 0.11.2 with PHP 8.0, which was released on 2019-04-17 (also the latest version for now).

PHP Fatal error: Array and string offset access syntax with curly braces is no longer supported in /home/runner/work/Edit-Flow/Edit-Flow/vendor/exussum12/coverage-checker/src/ArgParser.php on line 25

Our test is here https://github.com/Automattic/Edit-Flow/runs/2407816247?check_suite_focus=true

I see that this error was fixed on b5c7b7f

But there is no release for it. Could you consider releasing it?

Thanks in advance.

[exussum12]

v1.0.0 tagged - if your using the binary nothing should change, if you depend on internal classes some the the structure has changed

[htdat]

Great! Thank you a lot.