Fail action when script fails.

lib/main.js

@@ -64,7 +64,7 @@ function run() {
                 yield exec.exec(`${script}`);
             }
             catch (error) {
-                console.error(error.message);
+                core.setFailed(error.message);
             }
             // finally kill the emulator
             yield emulator_manager_1.killEmulator();

src/main.ts

@@ -56,7 +56,7 @@ async function run() {
     try {
       await exec.exec(`${script}`);
     } catch (error) {
-      console.error(error.message);
+      core.setFailed(error.message);
     }
 
     // finally kill the emulator