properly throw errors from fetcher

although we were catching the error in `#fetcher`, we weren't returning
it as an error. it was being returned to the caller as the `data` value.
this means none of our `isError` checks for GET requests were working
properly.
with this commit, we're throwing the error so that we are handling it
on the view correctly.

Author: alishaevn

utils/api/base.js

@@ -11,6 +11,7 @@ export const fetcher = (url, token) => {
     .then(res => res.data)
     .catch(error => {
       Sentry.captureException(error)
+      throw error
     })
 }