Miniflare 2.0: fully-local development and testing for Workers

Miniflare 2.0 is released, offering a fully-local development and testing environment for Cloudflare Workers. Key improvements include modularity (splitting components into separate packages), a lightweight design (reducing dependencies and install size), and increased accuracy in replicating the Workers runtime. It introduces live-reload features and first-class support for Jest testing. Miniflare 2.0 is integrated into Wrangler 2.0, simplifying local development workflows.