Add fixture `stairville/matrixx-fx-550-dmx`

[FloEdelmann]

• Add fixture stairville/matrixx-fx-550-dmx

Thank you Gamby!

[github-actions[bot]]

Export files validity

(Output of test script tests/github/exports-valid.js.)

Test the exported files of selected fixtures against the plugins' export tests. You can run a plugin's export tests by executing: $ node cli/run-export-test.js -p <plugin name> <fixtures>

✔️ stairville / matrixx-fx-550-dmx: d-light / attributes-correctness

• ✔️ stairville/matrixx-fx-550-dmx-512.xml

✔️ stairville / matrixx-fx-550-dmx: dmxcontrol3 / channel-numbers

• ✔️ stairville-matrixx-fx-550-dmx-512.xml

✔️ stairville / matrixx-fx-550-dmx: dragonframe / json-schema-conformity

• ✔️ stairville/matrixx-fx-550-dmx.json
• ✔️ manufacturers.json

✔️ stairville / matrixx-fx-550-dmx: millumin / json-schema-conformity

• ✔️ stairville/matrixx-fx-550-dmx.json

✔️ stairville / matrixx-fx-550-dmx: qlcplus_4.12.2 / fixture-tool-validation

• ✔️ fixtures/Stairville-maTrixx-FX-550-DMX.qxf

✔️ stairville / matrixx-fx-550-dmx: qlcplus_4.12.2 / xsd-schema-conformity

• ✔️ fixtures/Stairville-maTrixx-FX-550-DMX.qxf