Add sourcemapping for typescript projects

Author: Ives van Hoorne

packages/app/src/sandbox/eval/transpilers/typescript/typescript-worker.js

@@ -49,14 +49,17 @@ self.addEventListener('message', event => {
     },
   };
 
-  let finalConfig = defaultConfig;
+  let finalConfig = { ...defaultConfig };
 
   if (config) {
     finalConfig = { ...config };
     finalConfig.compilerOptions = {
       ...config.compilerOptions,
       module: ts.ModuleKind.CommonJS,
       moduleResolution: ts.ModuleResolutionKind.NodeJs,
+      inlineSourceMap: true,
+      inlineSources: true,
+      emitDecoratorMetadata: true,
     };
   }