Fix status code check should be optional, fix HTTP response other than 1.1 should not result in error, fix usage of strpos, cleanup.
Cleanup.
Prevent Apc* checks' fatal error with APC extension missing, remove CLI check, cleanup.
Fix use of SecurityAdvisory without supplying checker instance or composer.lock path.
Simplify SecurityAdvisory, do not expect or use passed-in instance of checker as it accomplishes nothing, fix CS.
Add Check\PhpFlag.
Fix README.MD with info on missing checks, cleanup composer.json.