Upgrade hashbrown, indexmap

[jplatte]

The only breaking changes (changelog):

• Bump foldhash, the default hasher, to 0.2.0.
• Replaced DefaultHashBuilder with a newtype wrapper around foldhash instead
  of re-exporting it directly.

[DataTriny]

Thanks! Would you mind moving the hashbrown dependency at the workspace level? This would make future updates much easier.

[jplatte]

Done.

[DataTriny]

Thank you!

[sou06912-design]

Good luck