Add fixture thomann/mhx20

[FloEdelmann]

• Update manufacturers.json
• Add fixture thomann/mhx20

Fixture warnings / errors

• thomann/mhx20
  • ⚠️ Capability 'Pan angle 0…100% (Maximum tilt angle configurable on device)' (0…255) in channel 'Pan' defines an imprecise percentaged angle. Please to try find the value in degrees.
  • ⚠️ Capability 'Tilt angle 0…100% (Max tilt angle configurable on device)' (0…255) in channel 'Tilt' defines an imprecise percentaged angle. Please to try find the value in degrees.
  • ⚠️ Capability 'Pan angle 0…100% (Fine adjustment of pan)' (0…255) in channel 'Pan 2' defines an imprecise percentaged angle. Please to try find the value in degrees.
  • ⚠️ Capability 'Tilt angle 0…100% (Fine adjustment of tilt)' (0…255) in channel 'Tilt 2' defines an imprecise percentaged angle. Please to try find the value in degrees.
  • ⚠️ Unused wheel slot(s): Color Wheel (slot 9), Color Wheel (slot 10), Color Wheel (slot 11)

Thank you @wandeltn!

[github-actions]

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>

❌ thomann / mhx20: d-light / attributes-correctness

• ✔️ thomann/mhx20-6ch.xml
• ❌ thomann/mhx20-11ch.xml

  Error parsing XML: Duplicate parameter name: FOCUS/PAN,Duplicate parameter name: FOCUS/TILT

❌ thomann / mhx20: dmxcontrol3 / channel-numbers

• ❌ thomann-mhx20-6ch.xml

  Channel 6 "Gobo Wheel" is missing capabilities. Used ranges: 0…119, 128…255
• ❌ thomann-mhx20-11ch.xml

  Channel 9 "Gobo Wheel" is missing capabilities. Used ranges: 0…119, 128…255

✔️ thomann / mhx20: dragonframe / json-schema-conformity

• ✔️ thomann/mhx20.json
• ✔️ manufacturers.json

✔️ thomann / mhx20: millumin / json-schema-conformity

• ✔️ thomann/mhx20.json

❌ thomann / mhx20: qlcplus_4.12.2 / fixture-tool-validation

• ❌ fixtures/Thomann-MHX20.qxf

  Namespace(map=False, convert=None, validate=['.']) Starting validation ./manufacturer/fixture.qxf: Invalid PAN degrees ./manufacturer/fixture.qxf: Invalid TILT degrees 1 definitions processed. 2 errors detected

✔️ thomann / mhx20: qlcplus_4.12.2 / xsd-schema-conformity

• ✔️ fixtures/Thomann-MHX20.qxf