chore: 依存関係を再現できるようにlockファイルをgitに挙げるようにする(#48)

Author: cacaoMath

.gitignore

@@ -96,7 +96,7 @@ ipython_config.py
 #   However, in case of collaboration, if having platform-specific dependencies or dependencies
 #   having no cross-platform support, pipenv may install dependencies that don't work, or not
 #   install all needed dependencies.
-Pipfile.lock
+# Pipfile.lock
 
 # poetry
 #   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.