v2.0.0.beta2

• Fixed: Beta-related install issues with Bundler (by making bridgetown-foundation a direct dependency of bridgetown, and relocating versioning responsibility to the foundation gem)
• Fixed: new command still outputs Liquid code by default in posts.md
• Add additional Array features to Collection directly (.last, [])
• Allow plugin gems to provide "features" which are automatically required #900 (@jaredcwhite)