Revert clap version bump (#111)

* Update README.md

* Update release-cross.yml

* Update release.yml

* style(self_update): Run cargo fmt (#108)

The commit 9105a8aac is not formatted, which breaks the CI check.

Co-authored-by: Thomas Schönauer <37108907+DottoDev@users.noreply.github.com>

* Clap dependencie change

* Revert clap changes

Co-authored-by: pan93412 <pan93412@gmail.com>

README.md

@@ -69,6 +69,12 @@ For tools please open an Issue describing the tool, which platforms it supports
 
 Just fork the repository and start coding.
 
+### Contribution Guidelines
+
+- Check if your code passes `cargo fmt` and `cargo clippy`.
+- Check if your code is self explanatory, if not it should be documented by comments.
+- Make a Pull Request to the dev branch for new features or to the bug-fixes branch for bug fixes.
+
 ## Remote execution
 
 You can specify a key called `remote_topgrades` in the configuration file.