Merge pull request #2520 from alcohol/master

composer 1.3.1 release

library/composer

@@ -3,8 +3,8 @@
 Maintainers: Composer (@composer), Rob Bast (@alcohol)
 GitRepo: https://github.com/composer/docker.git
 
-Tags: 1.3.0, 1.3, 1, latest
-GitCommit: 42d33131b49f1696205f3b708c6d1513b20823ce
+Tags: 1.3.1, 1.3, 1, latest
+GitCommit: eb996e63c904992ebe1092e8732afa553a29932a
 Directory: 1.3
 
 Tags: 1.2.4, 1.2