chore(metadata): add works-with metadata annotations re: rhsso and ke…

…ycloak, using npm version notation (RHIDP-2680) (janus-idp#1981)

chore(metadata): add works-with metadata annotations re: rhss and keycloak, using npm version notation

Signed-off-by: Nick Boldt <nboldt@redhat.com>

plugins/keycloak-backend/package.json

@@ -92,7 +92,9 @@
     "support:production",
     "lifecycle:active",
     "backstage",
-    "plugin"
+    "plugin",
+    "works-with:rhsso:^7.6",
+    "works-with:keycloak:~18"
   ],
   "homepage": "https://red.ht/rhdh",
   "bugs": "https://github.com/janus-idp/backstage-plugins/issues",