v0.15.0

What's Changed

• Scaffold out plugin system using pluggy by @joshuadavidthomas in #185
• Refactor asset collection to new internal plugin by @joshuadavidthomas in #186
• move internal plugin back to staticfiles module by @joshuadavidthomas in #187
• Add documentation for plugins by @joshuadavidthomas in #188
• 🔖 bump version 0.14.2 -> 0.15.0 by @joshuadavidthomas in #189

Full Changelog: v0.14.2...v0.15.0