added tests for ToneBlocks.js file (sugarlabs#4612)

* edited

* added tests for toneBlocks.js

* fixed linting issues

---------

Co-authored-by: Studycode001 <148090007+Studycode001@users.noreply.github.com>

Author: alokdangre

js/blocks/ToneBlocks.js

@@ -1152,3 +1152,8 @@ function setupToneBlocks(activity) {
     new VoiceNameBlock().setup(activity);
     new SetTimbreBlock().setup(activity);
 }
+
+
+if (typeof module !== "undefined" && module.exports) {
+    module.exports = { setupToneBlocks };
+}