Parse --json option as json

[spasche]

I tried to fire an event and noticed that the --json argument content is passed as a string to home assistant, which returns the error: 400 - {"message": "Event data should be a JSON object"}

This PR converts the option into a JSON object.

Example call: hass-cli event fire MY_EVENT --json '{"foo": "bar"}'

[homeassistant]

Hi @spasche,

It seems you haven't yet signed a CLA. Please do so here.

Once you do that we will be able to review and accept this pull request.

Thanks!

[codecov-io]

Codecov Report

Merging #310 into dev will not change coverage. The diff coverage is 0%.

@@           Coverage Diff           @@
##              dev     #310   +/-   ##
=======================================
  Coverage   75.25%   75.25%           
=======================================
  Files          22       22           
  Lines        1560     1560           
=======================================
  Hits         1174     1174           
  Misses        386      386

Impacted Files	Coverage Δ
homeassistant_cli/plugins/event.py	47.72% <0%> (ø)	:arrow_up:

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[maxandersen]

rebased to get CI to pass.

@spasche Any chance you can update the tests for events to include verification for your fix here ?

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[fabaff]

Cherry-picked https://github.com/home-assistant-ecosystem/home-assistant-cli/pull/387