GitHub Actions workflow to demo it #52

Job	Run time
Docker	1m 7s
Linters (8.1)	1m 3s
Phar (8.1)	31s
Linters (8.2)	42s
Phar (8.2)	36s
Linters (8.3)	38s
PHPUnit (8.1, xdebug, --prefer-lowest)	29s
Reports (8.1)	30s
PHPUnit (8.1, xdebug)	50s
Reports (8.2)	32s
PHPUnit (8.1, none, --prefer-lowest)	26s
Phar (8.3)	39s
Reports (8.3)	47s
PHPUnit (8.1, none)	23s
PHPUnit (8.2, xdebug, --prefer-lowest)	36s
PHPUnit (8.2, xdebug)	31s
PHPUnit (8.2, none, --prefer-lowest)	23s
PHPUnit (8.2, none)	21s
PHPUnit (8.3, xdebug, --prefer-lowest)	1m 19s
PHPUnit (8.3, xdebug)	55s
PHPUnit (8.3, none, --prefer-lowest)	20s
PHPUnit (8.3, none)	28s
	14m 6s

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