Failed script reported as successfully executed

I use `drone-ssh` to execute a shell script on a server.

This script has an abort trap and in that case exits with the error code:

```shell
#!/bin/bash
set -eu

abort() {
echo "an error occurred. exiting..."
exit $?
}

trap 'abort' ERR

# do something
```

However, in the case an error occurs it is still being reported as "Successfully executed commands to all host.".
In this particular case it was a git command that failed, not sure if this makes a difference. I assume that the exit code != 0 so I would expect that this is detected as an error.

In the settings I have `script_stop: true`.

Start by reproducing the remote shell script failure with script_stop: true and the ERR trap shown in the issue, then trace how drone-ssh receives and evaluates the remote command's exit status. Confirm that a nonzero exit from the failed script is propagated and reported as a failure rather than successful execution.

Written by the indexing model from the issue text.