See config.responseType instead of request.responseType when suprressing DOMException

lib/adapters/xhr.js

@@ -137,7 +137,9 @@ module.exports = function xhrAdapter(config) {
       try {
         request.responseType = config.responseType;
       } catch (e) {
-        if (request.responseType !== 'json') {
+        // Expectes DOMException thrown by browsers not compatible XMLHttpRequest Level 2.
+        // But, this can be suppressed for 'json' type as it can be parsed by default 'transformResponse' function.
+        if (config.responseType !== 'json') {
           throw e;
         }
       }