WIP: Codecov instead of sonar

[helto4real]

Breaking change

Proposed change

Type of change

Trying out codecov (do not merge)

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New feature (which adds functionality to an existing integration)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue:
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
• Local tests pass. Your PR cannot be merged unless tests pass
• There is no commented out code in this PR.
• I have followed the [development checklist][dev-checklist]
• The code compiles without warnings (code quality chek)
• Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for www.home-assistant.io

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (dev@18aa863). Click here to learn what that means.
The diff coverage is n/a.

@@          Coverage Diff           @@
##             dev     #399   +/-   ##
======================================
  Coverage       ?   54.85%           
======================================
  Files          ?       83           
  Lines          ?     4585           
  Branches       ?      704           
======================================
  Hits           ?     2515           
  Misses         ?     1846           
  Partials       ?      224           

Flag	Coverage Δ
unittests	54.85% <0.00%> (?)

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