fix(smartdeno): normalize stderr output to an empty string and update build configuration

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartdeno',
-  version: '1.2.0',
+  version: '1.2.1',
   description: 'A module to run Deno scripts from Node.js, including functionalities for downloading Deno and executing Deno scripts.'
 }

ts/classes.smartdeno.ts

@@ -132,7 +132,7 @@ export class SmartDeno {
     return {
       exitCode: result.exitCode,
       stdout: result.stdout,
-      stderr: result.stderr,
+      stderr: result.stderr ?? '',
     };
   }
 
@@ -162,7 +162,7 @@ export class SmartDeno {
       return {
         exitCode: result.exitCode,
         stdout: result.stdout,
-        stderr: result.stderr,
+        stderr: result.stderr ?? '',
       };
     } finally {
       // Clean up temp file