Updated Travis CI configuration to pass all builds (replace #173)

[michalbundyra]

Replace #173

[weierophinney]

Closing in favor of #173. While I note that the locked environments passed... they were not really locked, as they had to add additional dev dependencies. My take is that we simply need to test that it works against zend-mvc v2 and v3; if developers are grabbing the latest zend-view release, they will be on the latest zend-mvc as well in most cases, so a lowest/latest strategy works for us until we can bump to PHP 7.1+ and remove compatibility with zend-mvc v2 releases.