v0.15.1

Added

• IntoIterator trait implementation for &QualifierList and &mut QualifierList.
• fastobo::syntax::pest re-exporting the pest crate to use with fastobo::syntax.

Changed

• Bump smartstring dependency to v1.0.
• Bump obofoundry test dependency to v0.10.
• Bump fastobo-syntax to v0.7.4.
• Bump darling derive dependency to v0.14.
• Bump ordered-float dependency to v3.4.0.