Avoid pycares 5.0.0 upgrade

They have completely rewritten the API and broken aiodns that depends on it.
Unfortunately the dependencies for aiodns do not prevent upgrading to the
incompatible version, so we have to put the restriction here.

requirements-dev.txt

@@ -1,5 +1,6 @@
 fuzzywuzzy
 levenshtein
+pycares~=4.11.0
 pytest-homeassistant-custom-component==0.13.254
 pytest
 pytest-asyncio