v0.15.7

ManifoldsBase v0.15.7

Diff since v0.15.6

Fixed

• is_point and is_vector can now more stably :info or :warn when they return false,
  since they emply showerror for these displays.

Merged pull requests:

• Bump actions/cache from 3 to 4 (#181) (@dependabot[bot])
• Fix info/warn print of checks (#182) (@kellertuer)

Closed issues:

• Convenience for real-coefficient bases construction (#180)