Package names containing "-"

[Rouzbeh Afrasiabi]

pigar fails to properly extract the package name when creating requirements.txt this happens when the package name contains "-". Example: scikit_learn == 0.24.2 instead of scikit-learn == 0.24.2. This seems to be due to core.parse_installed_packages() or any string formatting that is performed before or during execution of this function.