Verify that CONF_INCLUDE and CONF_EXCLUDE look like arrays

[franc6]

Fixes #158

Description of change:

Formatting, testing, and code coverage

Please note your pull request won't be accepted if you haven't properly formatted your source code, and ensured the unit tests are appropriate. Please note if you are not running on Windows, you can either run the scripts via a bash installation (like git-bash).

• formatstyle.sh reports no errors
• All unit tests pass (test.sh)
• [] Code coverage has not decreased (test.sh)

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

Attention: Patch coverage is 28.57143% with 5 lines in your changes missing coverage. Please review.

Project coverage is 80.24%. Comparing base (b6c693e) to head (af964bc).

Files with missing lines	Patch %	Lines
custom_components/ics_calendar/config_flow.py	28.57%	5 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@             Coverage Diff              @@
##           releases     #160      +/-   ##
============================================
- Coverage     80.84%   80.24%   -0.60%     
============================================
  Files            11       11              
  Lines           642      648       +6     
  Branches        120      122       +2     
============================================
+ Hits            519      520       +1     
- Misses           96      101       +5     
  Partials         27       27              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.