Add scripts for release preparation

[lampajr]

Fixes Issue

Fixes https://github.com/Hyperfoil/horreum-client-python/issues/8

Changes proposed

• [x] Create script to automate the next release cycle preparation
• [x] Create a script to update the version

Check List (Check all the applicable boxes)

• [x] My code follows the code style of this project.
• [ ] My change requires changes to the documentation.
• [x] I have updated the documentation accordingly.
• [ ] All new and existing tests passed.

[lampajr]

I found a bunch of small things, and I've offered a few suggestions.

Hi @webbnh , I really appreciate all your suggestions they were really great!!!!