Zigbee set value

[atrovato]

Pull Request check-list

To ensure your Pull Request can be accepted as fast as possible, make sure to review and check all of these items:

• [ ] If your changes affects code, did your write the tests?
• [ ] Are tests passing? (npm test on both front/server)
• [ ] Is the linter passing? (npm run eslint on both front/server)
• [ ] Did you run prettier? (npm run prettier on both front/server)
• [ ] If you are adding a new features/services, did you run integration comparator? (npm run compare-translations on front)
• [ ] Did you test this pull request in real life? With real devices? If this development is a big feature or a new service, we recommend that you provide a Docker image to the community for testing before merging.
• [ ] If your changes modify the API (REST or Node.js), did you modify the API documentation? (Documentation is based on comments in code)
• [ ] If you are adding a new features/services which needs explanation, did you modify the user documentation? See the GitHub repo and the website.
• [ ] Did you add fake requests data for the demo mode (front/src/config/demo.js) so that the demo website is working without a backend? (if needed) See https://demo.gladysassistant.com.

NOTE: these things are not required to open a PR and can be done afterwards / while the PR is open.

Description of change

Please provide a description of the change here. It's always best with screenshots, so don't hesitate to add some!

[codecov[bot]]

Codecov Report

Merging #35 (18cdf78) into master (3b6fe44) will increase coverage by 0.00%. The diff coverage is 100.00%.

:exclamation: Current head 18cdf78 differs from pull request most recent head 6af0671. Consider uploading reports for the commit 6af0671 to get more accurate results

@@           Coverage Diff           @@
##           master      #35   +/-   ##
=======================================
  Coverage   96.59%   96.59%           
=======================================
  Files         616      617    +1     
  Lines        8898     8905    +7     
=======================================
+ Hits         8595     8602    +7     
  Misses        303      303           

Impacted Files	Coverage Δ
server/services/zigbee2mqtt/exposes/binaryType.js	100.00% <100.00%> (ø)
...rver/services/zigbee2mqtt/exposes/compositeType.js	100.00% <100.00%> (ø)
server/services/zigbee2mqtt/exposes/enumType.js	100.00% <100.00%> (ø)
server/services/zigbee2mqtt/exposes/numericType.js	100.00% <100.00%> (ø)
...ver/services/zigbee2mqtt/lib/findMatchingExpose.js	100.00% <100.00%> (ø)
...r/services/zigbee2mqtt/lib/getDiscoveredDevices.js	100.00% <100.00%> (ø)
...rver/services/zigbee2mqtt/lib/handleMqttMessage.js	100.00% <100.00%> (ø)
server/services/zigbee2mqtt/lib/index.js	100.00% <100.00%> (ø)
server/services/zigbee2mqtt/lib/readValue.js	100.00% <100.00%> (ø)
server/services/zigbee2mqtt/lib/setValue.js	100.00% <100.00%> (ø)
... and 5 more

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