[Travis] Test against php 7.0
[Travis] Test against php 7.0

mhlavac/flysystem,mhlavac/flysystem,sohelrana820/flysystem,dstockto/flysystem,dshafik/flysystem,nao-pon/flysystem,twistor/flysystem,farmisen/flysystem,oswaldderiemaecker/flysystem,hannesvdvreken/flysystem,sachintaware/flysystem,Amrit01/flysystem,twistor/flysystem