release version 2.1.0

changes
 * packaging: configured the coverage-analysis codecov.io
 * GitHub: improved issues-template
 * documentation: add troubleshooting tip to network-interface
 * the module, cli and documentation is now aware of the version of python-escpos
 * the cli does now support basic tabcompletion

contributors
 * Patrick Kanzler

Release version 2.0.0

released version 1.0.9

Updated README and documentation

Updated project version

Updated version