House keeping: PHP 7.1 now required, support for doctrine/inflector 2

Hi Makers!

This is a small release that requires/allows some newer versions of things:

• PHP 7.1 is now the required minimum version - #598 thanks to @weaverryan

• MakerBundle now allows doctrine/inflector 2.0 - #600 thanks to @alcaeus

v1.16.0...v1.17.0

Happy making!