BiGGer v1.2.0

Changelog:

• Added contribution/community guidelines (#4)
• Automated tests using Github Action runner (#3)
• Dockerfile for testing available (#2)
• Javadoc for BiGGer library is published at docshoster.org

BiGGer v1.1.0

Changelog for the current release:

• No new functionality has been added.
• Fixed a bigraphical rule in the example model "concurrent append problem" (Java unit test, and *.xmi files in sample folder).

BiGGer v1.0

First release