update response to correctly carry headers through (#384)

* update response to correctly carry headers through

src/response.rs

@@ -53,6 +53,15 @@ impl Response {
         Self { extensions, ..self }
     }
 
+    /// Set the http headers of the response.
+    #[must_use]
+    pub fn http_headers(self, http_headers: HeaderMap<String>) -> Self {
+        Self {
+            http_headers,
+            ..self
+        }
+    }
+
     /// Set the cache control of the response.
     #[must_use]
     pub fn cache_control(self, cache_control: CacheControl) -> Self {

src/schema.rs

@@ -478,6 +478,7 @@ where
             Err(e) => Response::from_errors(vec![e]),
         }
         .extensions(extensions)
+        .http_headers(std::mem::take(&mut *env.http_headers.lock()))
     }
 
     /// Execute a GraphQL query.