Pipreqs reports wrong version when package name != module name

[kelsey-sorrels-tagcg]

Steps to reproduce:

python3 -m venv testenv
source testenv/bin/activate
# install older version of scikit-learn
pip install pipreqs scikit-learn==0.20.3
mkdir test
echo "import sklearn" > test/test.py
pipreqs test
cat test/requirements.txt
deactivate

Actual Output
scikit_learn==0.24.2

Expected Output
scikit_learn==0.20.3

This occurs because get_import_local is called with package names in the imports parameter (by way of candidates = get_pkg_names(candidates)). It tests if each import is in local. However, local is a dict where the keys are module names. This results in not finding the locally installed package and instead looking up the latest version on pypi.org.