dodeca v0.15.0

What's Changed

• Migrate Dodeca to Vox 0.9 rc by @fasterthanlime in #274
• Collapse cells into the ddc monolith by @fasterthanlime in #275
• Absorb Dodeca core libraries by @fasterthanlime in #276
• Use published Picante crate by @fasterthanlime in #277

Full Changelog: v0.14.18...v0.15.0