Avoid promise.finally for Node 6.*

sun-zheng-an · sun-zheng-an · commit 77359bc1ab4f · 2019-03-24T21:05:14.000+08:00
diff --git a/index.ts b/index.ts
@@ -116,11 +116,12 @@ const shell = (
     runCommands(normalizedCommands, normalizedOptions, file)
       .then(() => {
         this.push(file)
+        done()
       })
       .catch(error => {
         this.emit('error', error)
+        done()
       })
-      .finally(done)
   })
 
   stream.resume()
