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

test/test.ts

@@ -15,6 +15,9 @@ tap.test('should throw when executing before start', async () => {
     await testSmartdeno.executeScript('console.log("test")');
   } catch (e) {
     threw = true;
+    if (!(e instanceof Error)) {
+      throw e;
+    }
     expect(e.message).toInclude('not started');
   }
   expect(threw).toBeTrue();