chore: bump msrv to 1.93

[SolarLiner]

Description

Please include a summary of the change and which issue is fixed. Include relevant motivation and context.

Type of Change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Performance improvement
• Code cleanup or refactor

How Has This Been Tested?

Run CI

Checklist:

• My code follows the style guidelines of this project
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Wherever possible, I have added tests that prove my fix is effective or that my feature works. For changes that
  need to be validated manually (i.e. a new audio driver), use examples that can be run to easily validate them.
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings

[SolarLiner]

@mbernat @strohel bumping MSRV here, wanted to let you guys know and get your green light before merging this in