databases/py-redisvl: Update to 0.18.0

Changelog:

• https://github.com/redis/redis-vl-python/releases/tag/v0.17.0
• https://github.com/redis/redis-vl-python/releases/tag/v0.17.1
• https://github.com/redis/redis-vl-python/releases/tag/v0.18.0

Reported by: Repology