Add fixture `ltech/lt-955-oled`

[FloEdelmann]

• Update manufacturers.json
• Add fixture ltech/lt-955-oled

Thank you Anonymous!

[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>

✔️ ltech / lt-955-oled: d-light / attributes-correctness

• ✔️ ltech/lt-955-oled-5ch.xml

✔️ ltech / lt-955-oled: dmxcontrol3 / channel-numbers

• ✔️ ltech-lt-955-oled-5ch.xml

✔️ ltech / lt-955-oled: dragonframe / json-schema-conformity

• ✔️ ltech/lt-955-oled.json
• ✔️ manufacturers.json

✔️ ltech / lt-955-oled: millumin / json-schema-conformity

• ✔️ ltech/lt-955-oled.json

✔️ ltech / lt-955-oled: qlcplus_4.12.2 / fixture-tool-validation

• ✔️ fixtures/LTECH-LT-955-OLED.qxf

✔️ ltech / lt-955-oled: qlcplus_4.12.2 / xsd-schema-conformity

• ✔️ fixtures/LTECH-LT-955-OLED.qxf