Release: v1.3.1

[HafeezOJ]

Name the Issue

• I have named this issue using the new version number.

Create branch

• Check that the title of this issue reflects the new version number.
• Create a new branch by clicking on create branch on the right-hand sidebar (as shown in the GitHub docs). Leave all options as default.

Bump Version in the New Branch

• Update setup.py
• Update ldcoolp/__init__.py
• Update requirements.txt (if needed)
• Update README.md (if needed)

Pull request

• Create a new PR. Ensure the base branch is main or master and the comparison branch is the new branch. Use the "Release" PR template.