Replace audioop with numpy for Python 3.13

[themanyone]

Description

Please start with one or two sentence description of what this pull request does. Fixes #61 by replacing missing audioop builtin with numpy for Python 3.13

If needed follow up with as much detail as required.

Type of PR

If your PR fits more than one category, there is a high chance you should submit more than one PR. Please consider this carefully before opening the PR. Either delete those that do not apply, or add an x between the square brackets like so: - [x]

• [x] Bugfix
• [ ] Feature implementation
• [ ] Refactor of code (without functional changes)
• [ ] Documentation improvements
• [ ] Test improvements

Testing

mimic3 "Hello there. This is a test"