add config.d.ts to files

Signed-off-by: Emma Indal <emma.indahl@gmail.com>

plugins/stack-overflow-backend/package.json

@@ -41,7 +41,7 @@
   },
   "files": [
     "dist",
-    "config"
+    "config.d.ts"
   ],
   "configSchema": "config.d.ts"
 }

plugins/stack-overflow/package.json

@@ -54,7 +54,7 @@
   },
   "files": [
     "dist",
-    "config"
+    "config.d.ts"
   ],
   "configSchema": "config.d.ts"
 }