fix(eslint-config): mark @testing-library/dom as optional dep

Author: dangreen

packages/eslint-config/package.json

@@ -37,6 +37,11 @@
     "@testing-library/dom": ">=8.0.0",
     "eslint": ">=7.0.0"
   },
+  "peerDependenciesMeta": {
+    "@testing-library/dom": {
+      "optional": true
+    }
+  },
   "dependencies": {
     "@typescript-eslint/eslint-plugin": "^6.0.0",
     "@typescript-eslint/parser": "^6.0.0",