Option to pass standard input

[pawamoy]

Is your feature request related to a problem? Please describe.
To pass standard input to a command, one must use subprocess manually again.

Describe the solution you'd like
Instead of having to run a subprocess manually, provide an option to pass standard input to a command.

Describe alternatives you've considered
Using subprocess to manually pass standard input.

    def _run_safety():
        process = subprocess.run(cmd, input=dependencies, encoding="utf8", stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
        print(process.stdout, end="")
        return process.returncode

    ctx.run(_run_safety, title="Checking absence of CVEs", pty=pty)

[pawamoy]

For reference: pexpect/ptyprocess#57

[pawamoy]

Now possible thanks to failprint 0.8.