Add visibility argument to service definition

[cedricziel]

That's a fix for the fix in #793 and equally important.

The service definition missed the visibility argument since I at first added it dynamically (which was fixed in #793 - thx for that!). This patch simply adds the argument to the static definition so the 5th argument can now be set correctly.

Without the patch the container cannot be build and fatals with Symfony 3.2-dev

[Symfony\Component\DependencyInjection\Exception\OutOfBoundsException]                               
  Service "liip_imagine.cache.resolver.flysystem_resolver": The index "4" is not in the range [0, 3].

[robfrawley]

Looks like Symfony learned to count in the latest development release! Good catch; thanks for the PR!

[robfrawley]

LGTM

[robfrawley]

@lsmith77 This is an important PR that fixes an oversight (introduced in my PR: #793) when running symfony/symfony:3.2@dev that resolves a fatal error for those running this bleeding edge Symfony release. It should be promptly merged, IMHO.