Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/83d0cbd: Update to commit ce1a3c07c4e17ed176edccd75892dfcf8242de60

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20200518, devel
+Tags: devel-20200520, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 887f3d4d63f6c990c5ed743b43167f2c6c6dc4c7
+GitCommit: 83d0cbdaaa563e4650cc99db33b4c88be4c21b29
 Directory: devel
 
 Tags: 5.0.17, 5.0, 5, latest