bump version to 5.4.0

Merge pull request #459 from remotemobprogramming/451-fix

fix #451

bump version

Merge pull request #450 from remotemobprogramming/fix-help

fix documentation of mob start --discard-uncommitted-changes

Merge pull request #447 from remotemobprogramming/discard-uncommitted…

…-changes

#446 mob start --discard-uncommitted-changes

bump version

Co-authored-by: Dario Zanotto <d.zanotto@gmail.com>
Co-authored-by: Martin Sereinig <ms@veryunited.net>
Co-authored-by: Harald Reingruber <harald.reingruber@gmail.com>
Co-authored-by: Michael Weichselbaumer <02.angeln-statuten@icloud.com>
Co-authored-by: Ricardo Colombo <clmb.olv@gmail.com>
Co-authored-by: Bernadette Hammerle <bernadette.elena.hammerle@gmail.com>

add version 5.1.1 to changelog

Socrates Release

Merge pull request #435 from remotemobprogramming/434-push-options

fix #434 ci skip push option is evaluated incorrectly

build windows version on linux