Config: apply CorsResourcePolicy to PUT requests

PUT requests are part of the public upsert API, so if postgrest
runs at a different origin, these requests will fail because they
don't pass CORS.

src/PostgREST/Config.hs

@@ -82,7 +82,7 @@ data AppConfig = AppConfig {
 
 defaultCorsPolicy :: CorsResourcePolicy
 defaultCorsPolicy =  CorsResourcePolicy Nothing
-  ["GET", "POST", "PATCH", "DELETE", "OPTIONS"] ["Authorization"] Nothing
+  ["GET", "POST", "PATCH", "PUT", "DELETE", "OPTIONS"] ["Authorization"] Nothing
   (Just $ 60*60*24) False False True
 
 -- | CORS policy to be used in by Wai Cors middleware