Fix error messages for non-Chrome browsers. (#1568)

Check if error.stack contains error.message, and if not, append it to the error message
printed to the console.
This should fix error messages in Firefox and Safari.

src/graphql.tsx

@@ -564,9 +564,16 @@ export default function graphql<
           // _feel_ like it was logged ASAP while still tolerating asynchrony.
           let logErrorTimeoutId = setTimeout(() => {
             if (error) {
+              let errorMessage = error;
+              if (error.stack) {
+                errorMessage = error.stack.includes(error.message)
+                  ? error.stack
+                  : `${error.message}\n${error.stack}`;
+              }
+
               console.error(
                 `Unhandled (in react-apollo:${graphQLDisplayName})`,
-                error.stack || error,
+                errorMessage,
               );
             }
           }, 10);