Always add response headers to the redux store (amplitude#84)

* Always add response headers to the redux store

* correcting typo and adding selector

* Update tab size

Author: hobbeswalsh

src/reducers/queries.js

@@ -37,6 +37,7 @@ const queries = (state = initialState, action) => {
           isPending: false,
           lastUpdated: action.time,
           status: action.status,
+          headers: action.responseHeaders,
         },
       };
     }

src/selectors/query.js

@@ -26,6 +26,14 @@ export const status = (queriesState, queryConfig) => {
   }
 };
 
+export const headers = (queriesState, queryConfig) => {
+  if (queryConfig) {
+    const queryKey = getQueryKey(queryConfig);
+
+    return get(queriesState, [queryKey, 'headers']);
+  }
+};
+
 export const lastUpdated = (queriesState, queryConfig) => {
   if (queryConfig) {
     const queryKey = getQueryKey(queryConfig);