Fix terminal issues in jupyterlab

[AlbertDeFusco]

Using conda-project activate in jupyterlab leads to a non-interactive shell experience. A little experimentation leads me to believe that the problem is in pexpect.spaw

conda-project/src/conda_project/conda.py

Line 165 in a3e84f1

command=shell_path, args=args, cwd=working_dir, env=env, echo=False

I believe the correct usage is

        child_shell = pexpect.spawn(
            command=shell_path, args=args, cwd=working_dir, env=env, echo=True
        )

I don't yet know if this will cause problems elsewhere.