Add rule-count badges to README (#47) #241

Job	Run time
Verify Docker	1m 5s
Linters (8.1)	38s
Linters (8.2)	40s
PHPUnit (8.1, xdebug, --prefer-lowest)	34s
Reports (8.1)	29s
Linters (8.3)	35s
PHPUnit (8.1, xdebug)	35s
Reports (8.2)	51s
PHPUnit (8.1, none, --prefer-lowest)	21s
Reports (8.3)	30s
PHPUnit (8.1, none)	28s
PHPUnit (8.2, xdebug, --prefer-lowest)	35s
Verify PHAR (8.1)	29s
PHPUnit (8.2, xdebug)	52s
Verify PHP binary	15s
Verify PHAR (8.2)	24s
PHPUnit (8.2, none, --prefer-lowest)	20s
Verify PHAR (8.3)	24s
PHPUnit (8.2, none)	21s
PHPUnit (8.3, xdebug, --prefer-lowest)	48s
PHPUnit (8.3, xdebug)	36s
PHPUnit (8.3, none, --prefer-lowest)	21s
PHPUnit (8.3, none)	26s
	12m 37s

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