Block dependencies that depend on enum34 (#8698)

* Block dependencies that depend on enum34

* Remove uninstalling enum34

* Update validation script

* Add constraints to tox.ini

* Upgrade yeelight to version that uses enum-compat

* Disable sensor.skybeacon

* Lint

virtualization/Docker/Dockerfile.dev

@@ -29,8 +29,7 @@ COPY requirements_all.txt requirements_all.txt
 # Uninstall enum34 because some depenndecies install it but breaks Python 3.4+.
 # See PR #8103 for more info.
 RUN pip3 install --no-cache-dir -r requirements_all.txt && \
-    pip3 install --no-cache-dir mysqlclient psycopg2 uvloop cchardet && \
-    pip3 uninstall -y enum34
+    pip3 install --no-cache-dir mysqlclient psycopg2 uvloop cchardet
 
 # BEGIN: Development additions