Release v0.0.3

• switched from using pip.main to launching external process via python -m pip as it is the recommended way of calling pip (see https://pip.pypa.io/en/stable/user_guide/#using-pip-from-your-program)

Release v0.0.2

• the install_packages method now backs up the root logger before calling pip.main and restores it afterwards again

Release v0.0.1

• initial release