Add backfill changesets (#407)

* Add backfill changesets

* Miniflare-ify changesets

Co-authored-by: bcoll <[email protected]>

Author: GregBrimble

.changeset/big-seals-obey.md

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+---
+"@miniflare/http-server": patch
+---
+
+Fix reporting of server port when using `--port=0`. Closes
+[issue #381](https://github.com/cloudflare/miniflare/issues/381).

.changeset/breezy-gifts-buy.md

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+---
+"@miniflare/shared-test-environment": patch
+---
+
+Add missing `@miniflare/r2` dependency to `@miniflare/shared-test-environment`
+package.

.changeset/fifty-cobras-watch.md

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+---
+"@miniflare/core": patch
+---
+
+Add support for `TextEncoderStream`/`TextDecoderStream`. Closes
+[issue #389](https://github.com/cloudflare/miniflare/issues/389).

.changeset/itchy-needles-arrive.md

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+---
+"@miniflare/cache": patch
+---
+
+Return correct `Content-Length` from cache partial responses. Closes
+[issue #406](https://github.com/cloudflare/miniflare/issues/406).

.changeset/unlucky-moose-watch.md

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+---
+"@miniflare/durable-objects": patch
+---
+
+Return Durable Object `get()`s in lexicographic order. Closes
+[issue #393](https://github.com/cloudflare/miniflare/issues/393).