chore(eslint): upgrade deps

Author: pmb0

package.json

@@ -25,7 +25,7 @@
     "@apollo/client": "^3.3.20",
     "@commitlint/cli": "^13.0.0",
     "@commitlint/config-conventional": "^13.0.0",
-    "@heise/eslint-config": "^19.0.0",
+    "@heise/eslint-config": "^20.0.7",
     "@nestjs/cli": "^8.0.0",
     "@nestjs/common": "^8.0.0",
     "@nestjs/config": "^1.0.0",