cloudflare/miniflare v2.0.0-rc.3 on GitHub

The Miniflare docs now include a migration guide for upgrading from version 1.

Mounts are no longer accessible by default via /<mount_name>. You must specify routes in wrangler.toml using the route/routes/miniflare.route/miniflare.routes options for them to be accessible. See 🔌 Multiple Workers for more details. This feature was inspired by multiflare, created by @dan-lee.
All file-path-valued options are now resolved relative to the --root option
Miniflare#dispatchFetch will now rewrite the request's URL/Host header to match the upstream URL if specified
convertNodeRequest no longer accepts an upstream parameter, it now always uses the request's Host header

Make Request/Response bodys byte streams, allowing them to be read with bring-your-own-buffer readers
Allow setting the wrangler.toml environment when mounting workers with the CLI. For example, --mount api=./api@dev mounts the worker in the ./api directory as api, using the dev environment in ./api/wrangler.toml.
Allow setting the Durable Object script_name option via the CLI. For example, --do COUNTER=Counter@api binds the COUNTER Durable Object namespace using the Counter class exported by the mounted api worker.
Update error message when attempting to access bindings via global in modules mode for Cloudflare Pages
When the fetch_refuses_unknown_protocols compatibility flag isn't set, log a warning when attempting to use a protocol other than http or https
The upstream URL is now validated on startup if specified

Copy webSocket when constructing a Response from an existing Response, closes issue #100, thanks @universse
Allow constructing null body with empty-string, closes issue #101, thanks @PH4NTOMiki
Remove ASCII whitespace from atob input, closes issue #104, thanks @dan-lee
Remove keys limit from Durable Objects list() method, closes issue #105, thanks @vzaramel
Allow Sec-WebSocket-Protocol header in WebSocket fetch, closes issue #106, thanks @f5io
Fix uncaught rejection when closing server-sent events connection, closes issue #107, thanks @dan-lee
Bump undici to 4.11.1, allowing Responses with null bodies to be cloned, closes issue #110, thanks @payellodevsupport
Allow forbidden header mutation on Request/Response instances, closes cloudflare/wrangler2 issue #59, thanks @oliverjam
Allow missing parent script with mounted workers
Correctly handle attempting to read a key in a namespace that is also a key when using FileStorage, and throw when trying to write in this case (this is a limitation of Miniflare's file-system storage).
When the fetch_refuses_unknown_protocols compatibility flag isn't set, correctly replace non-standard protocols (e.g. random://) with http:// in fetch.
Remove types dependency on lib.webworker
Incoming https requests will now have https URLs