deps: update pgvector requirement from >=0.2 to >=0.5.0

[dependabot]

Updates the requirements on pgvector to permit the latest version.

Changelog

Sourced from pgvector's changelog.

0.5.0 (2026-07-06)

• Added experimental support for type hints
• Changed vector and halfvec types to return list for Django, SQLAlchemy, SQLModel, and Peewee
• Changed vector type to return Vector object for Psycopg 3, Psycopg 2, asyncpg, and pg8000
• Removed utils package (use top-level pgvector package instead)
• Removed re-exported classes (use top-level pgvector package instead)
• Removed dependency on NumPy
• Dropped support for Python < 3.10
• Dropped support for SQLAlchemy < 2

0.4.2 (2025-12-04)

• Added support for Django 6
• Added support for str objects for bit type with SQLAlchemy

0.4.1 (2025-04-26)

• Fixed SparseVector constructor for SciPy sparse matrices

0.4.0 (2025-03-15)

• Added top-level pgvector package
• Added support for pg8000
• Added support for bytes to Bit constructor
• Changed globally option to default to False for Psycopg 2
• Changed arrays option to default to True for Psycopg 2
• Fixed equality for Vector, HalfVector, Bit, and SparseVector classes
• Fixed indices and values methods of SparseVector returning tuple instead of list in some cases
• Dropped support for Python < 3.9

0.3.6 (2024-10-26)

• Added arrays option for Psycopg 2

0.3.5 (2024-10-05)

• Added avg function with type casting to SQLAlchemy
• Added globally option for Psycopg 2

0.3.4 (2024-09-26)

• Added schema option for asyncpg

0.3.3 (2024-09-09)

• Improved support for cursor factories with Psycopg 2

0.3.2 (2024-07-17)

... (truncated)

Commits

• 60739df Version bump to 0.5.0 [skip ci]
• a810f27 Updated example [skip ci]
• 45b054c Updated example [skip ci]
• efa1442 Updated examples [skip ci]
• 780cc73 Updated example [skip ci]
• 9f0d6b9 Updated examples [skip ci]
• f6e113e Updated example [skip ci]
• dc68770 Updated readme [skip ci]
• 0c18e0a Addressed todo
• 28191fc Removed todo [skip ci]
• Additional commits viewable in compare view

[DenisDrobyshev]

Closing: pgvector is declared in the api extra and imported nowhere in the source tree. Raising the floor of a dependency nothing uses is noise in the queue rather than a change.

See #26 — the Python pgvector package and psycopg are both declared for a Postgres index that has no Python implementation yet. Whether these stay in the extra at all is the decision that issue is about; a version bump would be premature either way.

Dependabot will reopen this if the situation changes.

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.