Merge pull request #22539 from fshowalter/patch-3

Allow @types/react 18 as a peer dep for @backstage/theme

plugins/explore/package.json

@@ -58,7 +58,7 @@
     "@backstage/plugin-search-react": "workspace:^",
     "@material-ui/core": "^4.12.2",
     "@material-ui/icons": "^4.9.1",
-    "@types/react": "^16.13.1 || ^17.0.0",
+    "@types/react": "^16.13.1 || ^17.0.0 || ^18.0.0",
     "classnames": "^2.2.6",
     "pluralize": "^8.0.0",
     "react-use": "^17.2.4"