update @iobroker/testing requirement from ^5.0.0 to ^5.0.3 (#1822)

Author: dependabot[bot]

package.json

@@ -65,7 +65,7 @@
     "@iobroker/adapter-dev": "^1.3.0",
     "@iobroker/build-tools": "^2.0.11",
     "@iobroker/eslint-config": "^1.0.0",
-    "@iobroker/testing": "^5.0.0",
+    "@iobroker/testing": "^5.0.3",
     "@iobroker/vis-2-widgets-react-dev": "^4.0.4",
     "@types/node-schedule": "^2.1.7",
     "@types/nodemailer": "^6.4.17",