Don't working with pip20.x.x

[yusufusta]

Traceback (most recent call last):
  File "/usr/local/bin/important", line 5, in <module>
    from important.__main__ import check
  File "/usr/local/lib/python3.7/site-packages/important/__main__.py", line 12, in <module>
    from important.parse import parse_dir_imports, parse_file_imports, \
  File "/usr/local/lib/python3.7/site-packages/important/parse.py", line 20, in <module>
    from pip.commands.show import search_packages_info

python version: 3.7
pip version: 20.0.2