miniflare@4.20260507.0

Minor Changes

• #13836 039bada Thanks @Skye-31! - Support named recipients in the Email Sending API MessageBuilder

  The send_email binding's MessageBuilder now accepts EmailAddress objects for to, cc, and bcc in addition to plain strings. You can mix named and plain addresses in the same array:

  await env.SEND_EMAIL.send({
    from: "sender@example.com",
    to: [
      "plain@example.com",
      '"Name" <address@example.com>',
      { name: "Jane Doe", email: "jane@example.com" },
    ],
    cc: [{ name: "CC Person", email: "cc@example.com" }],
    subject: "Hello",
    text: "...",
  });

  Additionally, addresses in "Name" <address> format are now correctly parsed when checking allowed_destination_addresses and allowed_sender_addresses restrictions.

• #13776 1a54ac5 Thanks @petebacondarwin! - Default the workerd runtime subprocess to TZ=UTC to match the production Cloudflare runtime

  Previously, Miniflare inherited the host machine's timezone, so Date and Intl APIs inside a Worker observed the developer's local timezone during local development but UTC in production. This caused dev/prod drift that was hard to debug.

  Miniflare now sets TZ=UTC on the spawned workerd subprocess by default. A new unsafeRuntimeEnv option (a Record<string, string>) is available on the Miniflare constructor for advanced cases that need to override the default — for example, to test timezone-dependent behaviour:

  new Miniflare({
    modules: true,
    script: "...",
    unsafeRuntimeEnv: { TZ: "Europe/London" },
  });

Patch Changes

• #13829 2284f20 Thanks @dependabot! - Update dependencies of "miniflare", "wrangler"

  The following dependency versions have been updated:

  Dependency	From	To
  workerd	1.20260504.1	1.20260506.1

• #13841 332f527 Thanks @dependabot! - Update dependencies of "miniflare", "wrangler"

  The following dependency versions have been updated:

  Dependency	From	To
  workerd	1.20260506.1	1.20260507.1