Update @iobroker/adapter-core requirement from ^3.0.4 to ^3.1.6

Updates the requirements on [@iobroker/adapter-core](https://github.com/ioBroker/adapter-core) to permit the latest version.
- [Release notes](https://github.com/ioBroker/adapter-core/releases)
- [Commits](ioBroker/adapter-core@v3.0.4...v3.1.6)

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

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -42,7 +42,7 @@
     "node-snap7": "^1.0.7",
     "iconv-lite": "0.6.3",
     "async": "^3.2.5",
-    "@iobroker/adapter-core": "^3.0.4"
+    "@iobroker/adapter-core": "^3.1.6"
   },
   "devDependencies": {
     "@alcalzone/release-script": "^3.7.0",