Add integration_type hub to blue_current (home-assistant#158863)

Author: joostlek

homeassistant/components/blue_current/manifest.json

@@ -4,6 +4,7 @@
   "codeowners": ["@gleeuwen", "@NickKoepr", "@jtodorova23"],
   "config_flow": true,
   "documentation": "https://www.home-assistant.io/integrations/blue_current",
+  "integration_type": "hub",
   "iot_class": "cloud_push",
   "loggers": ["bluecurrent_api"],
   "requirements": ["bluecurrent-api==1.3.2"]