feat: Added option to override starting year for contributions

[chrisK824]

Description

Added argument for override minimum year in API request
Added parameter (default as null) to override the minimum year where contributions should count from

Fixes #503

Type of change

• New feature (added a non-breaking change which adds functionality)

How Has This Been Tested?

• Tested locally with a valid username
• Tested locally with an invalid username
• Ran tests with composer test

Checklist:

• I have checked to make sure no other pull requests are open for this issue
• The code is properly formatted and is consistent with the existing code style
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[chrisK824]

Hey @DenverCoder1 , I think that little addition is working just fine :)
Tested locally with my account for the new feature.

[DenverCoder1]

Hi, thanks for working on the issue, I have added a few comments. Feel free to let me know if you have any questions.

[chrisK824]

Thanks for the feedback @DenverCoder1 , I applied the changes you suggested :)

[DenverCoder1]

Just a couple really small things and I think this is good to merge 👍

(feel free to use the "commit suggestions" buttons on the GitHub UI)

[DenverCoder1]

Looks great! Thanks for the contribution 🎉