feat: Update bpmn-js to v18.3.1 dmn-js to v17.1.0 (#47)

fix: set background color for diagrams (#46)

fix: email (#45)

* fix: email

* fix: remove obsolete ci

fix: remove broken dmn edit capability (#40)

feat: Add unit tests (#39)

* feat: add devcontainer
* feat: Add github workflow for unit test
* feat: add tests

feat: upgrade bpmn-js and dmn-js (#35)

* feat: Added dmn modeler code

* feat: Upgrade bpmnio-js to v12.0.0

* doc: add info about DMN

* feat: Upgrade DMN to v14.1.1

* fix: Make dmn appear

feat: upgrade bpmn-js and dmn-js (#35)

* feat: Added dmn modeler code

* feat: Upgrade bpmnio-js to v12.0.0

* doc: add info about DMN

* feat: Upgrade DMN to v14.1.1

* fix: Make dmn appear in the editor page

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chore: bump version (#34)

fix: Add action.php & syntax.php are deleted files (#33)

feat: Integrate the BPMN editor (#32)

fix: Code cleanup (#31)

feat: Printer friendly pages (#29)

fix: Renamed `add` action to `toolbar`, introduced edit support (#28)

fix: renamed add to toolbar, added edit sections

feat: basic built-in editor support

fix: Fallback link pointing to github during dw2pdf rendering (#25)

fix: Cleanup by removing CMMN (#24)

feat: DMN diagram support (#23)

fix: more cleanup (#22)

* fix: remove unneeded things

* fix: more simplifications

fix: scrollbars and cleanup (#21)

* fix: scrollbars

* fix: Another bunch of cleanup

fix: diagram type added and code cleanup (#20)

fix: improved toolbar icon

feat: upgraded DMN.iO to v12.2.0

feat: added fr,de locales

fix: menu titles

fix: simplified styles and updated screenshot

fix: Repair the automatich scrollbar in a clean way

fix: Igor compatibility