update to Errbot, python/alpine, CiscoWebexTeams backend

update to Errbot 6.1.3, python/3.11-alpine, CiscoWebexTeams backend 1.5.0

Update to Errbot 6.1.2, Alpine 3.11, Python 3.6.10

Syncing release tag to errbot version. This release removes unnecessary installation of python development resources already present within the python:alpine container.

Includes a patch from ElfoLiNk in the included AlerrtmanagerrWebex plugin to support different alert formats.

1.0 release

Updated included CiscoWebexTeams plugin to 1.4.0