Prepare for v3.0.0-rc.1

package.json

@@ -1,6 +1,6 @@
 {
   "name": "frigate-hass-card",
-  "version": "2.1.0",
+  "version": "3.0.0-rc.1",
   "description": "Frigate Lovelace Card for Home Assistant",
   "keywords": [
     "frigate",

src/const.ts

@@ -1,4 +1,4 @@
-export const CARD_VERSION = '2.1.0' as const;
+export const CARD_VERSION = '3.0.0-rc.1' as const;
 export const REPO_URL = 'https://github.com/dermotduffy/frigate-hass-card' as const;
 export const TROUBLESHOOTING_URL = `${REPO_URL}#troubleshooting` as const;