Merge pull request #2373 from crate/0.56.4

Update Crate to 0.56.4

library/crate

@@ -8,8 +8,8 @@
 
 # see also https://crate.io
 
-latest: git://github.com/crate/docker-crate@c1fef97dacc607792b0002f8b7bf29761f408438
+latest: git://github.com/crate/docker-crate@758abd27c3fe8cc08f6094a90867f7502f584077
 0.55: git://github.com/crate/docker-crate@6f946af1ea0e0aefd75dd9fa781572e728cb8c88
 0.55.7: git://github.com/crate/docker-crate@6f946af1ea0e0aefd75dd9fa781572e728cb8c88
 0.56: git://github.com/crate/docker-crate@c1fef97dacc607792b0002f8b7bf29761f408438
-0.56.3: git://github.com/crate/docker-crate@c1fef97dacc607792b0002f8b7bf29761f408438
+0.56.4: git://github.com/crate/docker-crate@758abd27c3fe8cc08f6094a90867f7502f584077