Fix TypeScript import to handle default export (#5604)

Author: kobenguyent

lib/container.js

@@ -459,7 +459,7 @@ async function requireHelperFromModule(helperName, config, HelperClass) {
     if (ext === '.ts') {
       try {
         // Use the TypeScript transpilation utility
-        const typescript = await import('typescript')
+        const typescript = ((await import('typescript')).default || (await import('typescript')))
         const { tempFile, allTempFiles, fileMapping: mapping } = await transpileTypeScript(importPath, typescript)
 
         debug(`Transpiled TypeScript helper: ${importPath} -> ${tempFile}`)
@@ -875,7 +875,7 @@ async function loadSupportObject(modulePath, supportObjectName) {
       if (ext === '.ts') {
         try {
           // Use the TypeScript transpilation utility
-          const typescript = await import('typescript')
+          const typescript = ((await import('typescript')).default || (await import('typescript')))
           const { tempFile, allTempFiles, fileMapping: mapping } = await transpileTypeScript(importPath, typescript)
 
           debug(`Transpiled TypeScript file: ${importPath} -> ${tempFile}`)