Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/6bf2b6d: Update to commit ea31c00845c858098d232bd014bf27b5a63a668b

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20200403, devel
+Tags: devel-20200406, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 0a6886ee36fea082890f683e50817004f8cb9cd3
+GitCommit: 6bf2b6dd43835d8c9f977308fb1631dd90a4ac2c
 Directory: devel
 
 Tags: 5.0.16, 5.0, 5, latest