0.3.0 PHP 7.2

• ec787a6 added license (othillo)
• be3debc .mailmap for changelog (othillo)
• d4a4dcb Makefile (othillo)
• a833577 broadway/coding-standard ^1.0 (othillo)
• 661a664 added Travis CI build status badge (othillo)
• 620bfca applied coding standard (othillo)
• 70c4d05 return type hints (othillo)
• 69292d5 PHPUnit 8 (othillo)
• fd562a3 only test actively supported PHP versions (othillo)
• 005ed93 removed deprecated key sudo (othillo)
• 94bc03a configured Stale bot (othillo)
• b40d715 Moved guard into findBy otherwise findAll does not work (#5) (othillo)