0.4.0 PHP 7.2

• 0fd17df .mailmap for changelog (othillo)
• 9acea98 added license (othillo)
• b6fedf4 require broadway/broadway ^2.3.1 (othillo)
• 87da2e0 use make in Travis CI (othillo)
• 83e35fa added @doesNotPerformAssertions (othillo)
• e85f531 removed syntaxCheck (othillo)
• 96a51a0 fixed Travis CI build status badge (othillo)
• d12dea3 Makefile (othillo)
• 7569f37 broadway/uuid-generator is required by broadway/broadway (othillo)
• 3a5389f broadway/coding-standard ^1.0 (othillo)
• 9481383 added license (othillo)
• 3bb9096 applied coding standard (othillo)
• 0efd304 PHPUnit 8 (othillo)
• 68dcb89 require php >= 7.2 (othillo)
• a2b9ba8 set branch alias to 1.0.x-dev (othillo)
• dd13a90 only test actively supported PHP versions (othillo)
• da1f351 removed deprecated key sudo (othillo)