Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/42bd54f: Update to commit f43f678557d150aeca89836812ccfac506718280

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20200825, devel
+Tags: devel-20200901, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 65fbf132c506eb47b642f115d5eed61dab320bd6
+GitCommit: 42bd54fd2155c19cb6e0ae232a831d1785900da7
 Directory: devel
 
 Tags: 5.1-alpha, 5.1-rc, rc