[0.5.1] Dependency Updates & Minor Endpoint Update

This release serves as the official v0.5.0 release (see rc1, rc2, rc3, rc4, and rc5 for full changes), since I forgot to make a release for that.

On top of what was released in v0.5.0, the following changes have been made to this project in v0.5.1:

• Updates dependencies in all Rust binary and crate projects.
• Fixes a minor issue where the /terms endpoint requires a term query parameter.