Bump @iobroker/adapter-core from 2.6.8 to 3.0.4

Bumps [@iobroker/adapter-core](https://github.com/ioBroker/adapter-core) from 2.6.8 to 3.0.4.
- [Release notes](https://github.com/ioBroker/adapter-core/releases)
- [Commits](ioBroker/adapter-core@v2.6.8...v3.0.4)

---
updated-dependencies:
- dependency-name: "@iobroker/adapter-core"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -22,7 +22,7 @@
   },
     "dependencies": {
         "sync-exec": "^0.6.2",
-        "@iobroker/adapter-core": "^2.5.1"
+        "@iobroker/adapter-core": "^3.0.4"
     },
     "devDependencies": {
         "@iobroker/testing": "^2.6.0",