Bump version to v1.13.0b4

Author: OttoWinter

esphome-beta/config.json

@@ -42,6 +42,6 @@
   "slug": "esphome-beta",
   "startup": "application",
   "url": "https://beta.esphome.io/",
-  "version": "1.13.0b3",
+  "version": "1.13.0b4",
   "webui": "http://[HOST]:[PORT:6052]"
 }

template/config.yaml

@@ -56,7 +56,7 @@ esphome-beta:
   <<: *base
   directory: esphome-beta
   name: ESPHome (beta)
-  version: '1.13.0b3'  # BETA
+  version: '1.13.0b4'  # BETA
   slug: esphome-beta
   description: "Beta version of ESPHome Hass.io add-on."
   url: https://beta.esphome.io/