Test with Memcache on php7 (#83)
Test with Memcache on php7 (#83)

* Allow php7

I was surprised to see that it's not here yet. Assuming that the main repo has [php7 support already](https://github.com/php-cache/cache/blob/master/composer.json#L24), proposing to sync the change.

* PR 73: remove adapter memcache

* Fix

php-cache/memcache-adapter