v2.0.0-next.2

Fixes

• Added support for the Response#encodeBody property. If this is omitted or set to auto, Responses with a Content-Encoding header that includes gzip, deflate or br will be automatically encoded. Closes issue #72, thanks @SupremeTechnopriest.
• Getters on Request/Response are now enumerable, and headers added to Request/Response instances after construction will now be retained if those instances are used to construct new Request/Responses. Closes issue #73, thanks @maraisr and @somebody1234.
• Variables defined in .env files now override those in wrangler.toml. Closes issue #75, thanks @payellodevsupport for the PR.
• http and https protocols are now required for WebSocket upgrades via fetch as per the workers runtime
• Miniflare-added CF-* headers are now included in the HTML error response