Use git pull --rebase before push tag to prevent merge commits

Use git pull --rebase before push tag to prevent merge commits

Branch Concept

[FEATURE] RS-1988 : aoe/tagging library -> added branch switching

if the tagging script is called with the option '--switch-branch' together with a specified branch
git is checking out the existing local branch or creating a new local branch.

[FEATURE] changed checkout process

0.3.8

[FEATURE] RS-1988 aoe/tagging library checkout-Prozess anpassen

[FEATURE] changed checkout process to branch process

0.3.7

[FEATURE] RS-1988 aoe/tagging library checkout-Prozess anpassen

deleted php 5.4

0.3.6

[FEATURE] RS-1988 aoe/tagging library checkout-Prozess anpassen

[FEATURE] changed checkout process

0.3.5

[FEATURE] RS-1988 aoe/tagging library checkout-Prozess anpassen

[FEATURE] changed checkout process

whenever a feature or bugfix branch needs to be tagged,
git needs to checkout the branch first to check if a diff exists

1. git is now fetching origin to get all remote branches
2. then git is checking out the branch
   2.1 if: no local branch exists git will create it with argument -b
   2.2 else: local branch exists, git will checkout the local branch
   3 - end. business as usual

[FEATURE] changed checkout process

whenever a feature or bugfix branch needs to be tagged,
git needs to checkout the branch first to check if a diff exists

1. git is now fetching origin to get all remote branches
2. then git is checking out the branch
   2.1 if: no local branch exists git will create it with argument -b
   2.2 else: local branch exists, git will checkout the local branch
   3 - end. business as usual

[FEATURE] checking out specific branch before commit changes and pushing tag

[FEATURE] checking out branch when tagging

git is now checking out the specific branch when committing and pushing a tag

fix strict detection of git changes

0.3.1

[BUGFIX] added constraint testing if git diff is null or empty string