Fix for failing TS tests after upgrading to v3. (#3845)

Author: garg3133

lib/utils/index.js

@@ -590,6 +590,7 @@ class Utils {
     try {
       require('ts-node').register({
         esm: false,
+        transpileOnly: true,
         project: projectTsFile
       });
     } catch (err) {
@@ -693,8 +694,6 @@ class Utils {
   }
 }
 
-
-
 lodashMerge(Utils, {
   PrimitiveTypes,
   BrowserName,