Command stdout is only emitted on child process close

[lucasfernog]

Describe the bug
The tauri::process::Command API has a bug on the tokio mpsc usage: the stdout line is sent on the channel but the receiver only sees the message when the process is terminated.

To Reproduce
Steps to reproduce the behavior:

1. Open the API example
2. Click on the shell tab
3. Run the following command: `node -e "console.log('message'); while(true){}"
4. You'll see that the output is only seen when you click on the "kill" button

Expected behavior
The stdout line is seen immediately.

[MitchellMonaghan]

Hi I've been playing with Tauri and there seems to still be a issue with this unless I'm just being dumb. I am running the following in the browser/webview using the typescript api and no stdout or stderr is printed. The close event is fired and a pid is printed.

import * as tauri from '@tauri-apps/api'

try {
      const test = await tauri.path.resolvePath('C:\\Program Files\\Git\\cmd\\git.exe')
      console.log(test)

      const git = new tauri.shell.Command(test, ['status'])
      git.stdout = function (e) {
        console.log(e)
      }
      git.stderr = function (e) {
        console.log(e)
      }
      git.on('close', (arg) => {
        console.log(arg)
      })

      const myProcess = await git.spawn()
      console.log(myProcess)
    } catch (error) {
      console.log(JSON.stringify(error))
    }

[MitchellMonaghan]

Turns out I'm just a idiot false alarm carry on.