composer release 1.5.6

library/composer

@@ -3,8 +3,8 @@
 Maintainers: Composer (@composer), Rob Bast (@alcohol)
 GitRepo: https://github.com/composer/docker.git
 
-Tags: 1.5.5, 1.5, 1, latest
-GitCommit: 731db8e23398470eac34ebeed8816362b54d5089
+Tags: 1.5.6, 1.5, 1, latest
+GitCommit: 6c112b3c58d927257a0a3ddd1d1b3f784761fbf7
 Directory: 1.5
 
 Tags: 1.4.3, 1.4