Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/1839ce9: Update to commit 89d788fb0152724a93e0fdab8c15116e5c76572b

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20200207, devel
+Tags: devel-20200214, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 5ca7dcc2ef6daf72ac16816117222aec39a18589
+GitCommit: 1839ce92ab218a04bbb3d554717d8fd233067bef
 Directory: devel
 
 Tags: 5.0.16, 5.0, 5, latest