Run build on PHP 7.0 (nightly) and only send code coverage from one of the build.
Run build on PHP 7.0 (nightly) and only send code coverage from one of the build.

Closes #178

Signed-off-by: crynobone <e1a543840a942eb68427510a8a483282a7bfeddf@gmail.com>

orchestral/foundation,orchestral/foundation,stevebauman/foundation,orchestral/foundation