Bump @iobroker/adapter-core from 2.6.8 to 3.0.3

Bumps [@iobroker/adapter-core](https://github.com/ioBroker/adapter-core) from 2.6.8 to 3.0.3.
- [Release notes](https://github.com/ioBroker/adapter-core/releases)
- [Commits](ioBroker/adapter-core@v2.6.8...v3.0.3)

---
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

@@ -39,7 +39,7 @@
     "node-snap7": "^1.0.6",
     "iconv-lite": "0.6.3",
     "async": "^3.2.4",
-    "@iobroker/adapter-core": "^2.6.8"
+    "@iobroker/adapter-core": "^3.0.3"
   },
   "devDependencies": {
     "@alcalzone/release-script": "^3.6.0",