* Compatibility with TYPO3 9LTS only
* Update to prism 1.17
* Update to gulp 4.0 (only used for building)
* Use expression language for TS condition
* Overall code cleanup
* Removal of fallback mechanisms for TYPO3 8LTS
* Update to prism 1.9.0
* Added support for new Components:
** Arduino
** OpenCL
** Django/Jinja2
** N4JS
** Ren'py
** VB.Net
* Enabled support for YAML by default
* Removed bower (internal)
* Minor fixes
* [FEATURE] Line numbers are now configurable
* [TASK] Appearance tab is now visible in TCA
* [TASK] prism.js updated to 1.5.1
* [TASK] Compatibility with TYPO3 7 LTS and 8.3
* [TASK] Improved Documentation
* Prism.js 1.21.0
* Simplified handling
* "All languages" dropped
* Improved TCA