Improve phpunit wrapper
Improve phpunit wrapper

Use shell script instead of php for preloading framework override before starting test. They added this ability in 7.4.

Also it fixes problem in phpunit 8 as the start script can't be run using `require` because of `strict_types` declaration being on second line.

As a bonus, it removes the appearance of shebang line in test due to how `require` works.

notbakaneko/osu-web,notbakaneko/osu-web,omkelderman/osu-web,LiquidPL/osu-web,nekodex/osu-web,LiquidPL/osu-web,ppy/osu-web,notbakaneko/osu-web,nekodex/osu-web,nanaya/osu-web,LiquidPL/osu-web,nanaya/osu-web,nekodex/osu-web,notbakaneko/osu-web,ppy/osu-web,ppy/osu-web,nekodex/osu-web,nanaya/osu-web,LiquidPL/osu-web,ppy/osu-web,LiquidPL/osu-web,omkelderman/osu-web,notbakaneko/osu-web,ppy/osu-web,nanaya/osu-web,nekodex/osu-web,nanaya/osu-web,omkelderman/osu-web,omkelderman/osu-web