Validate component usage (#23037)

* Update manifest validator

* Update circle

* Update text

* Typo

* fix link to codeowners

* Merge CODEOWNERS into hassfest

* Annotate errors with fixable

* Convert error to warning

* Lint

* Make abs path

* Python 3.5...

* Typo

* Fix tests

homeassistant/components/cloud/manifest.json

@@ -6,7 +6,8 @@
     "hass-nabucasa==0.11"
   ],
   "dependencies": [
-    "http"
+    "http",
+    "webhook"
   ],
   "codeowners": [
     "@home-assistant/core"