chore(deps): update dependency proxy-chain to v3

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
proxy-chain (source)	^2.5.9 → ^3.0.0

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Release Notes

apify/proxy-chain (proxy-chain)

v3.0.0

Compare Source

This is a major release that modernizes the codebase. The runtime behavior of the
proxy server itself is unchanged; the breaking changes are about how you import,
package, and call the library.

• BREAKING: Dropped support for Node.js older than 20.11. The minimum supported
  version is now Node.js 20.11.
  See #​638,
  #​654.

• BREAKING: The package is now ESM-only ("type": "module" in package.json).
  Use import instead of require(). CommonJS consumers must migrate to ESM
  (or use a dynamic import()).
  See #​654.

• BREAKING: Removed Node.js-style callbacks from the entire public API.
  Server#listen(), Server#close(), anonymizeProxy(),
  closeAnonymizedProxy(), createTunnel(), and closeTunnel() now return a
  Promise only - use await or .then().
  See #​656.

• BREAKING: CustomResponse is now a type-only export. If you were importing
  it as a value, switch to import type { CustomResponse } from 'proxy-chain'.
  See #​654.

• Upgraded TypeScript to v5 and adopted NodeNext module resolution with
  verbatimModuleSyntax.
  See #​655.

• Added Bun runtime support. The library now loads cleanly under Bun and is
  validated on every PR via a dedicated Unit tests (Bun) job, plus an
  E2E tests (Bun, compatible) job that runs a curated Bun-safe subset of the
  e2e suite. A full toggle for running the entire e2e suite under Bun is
  available via workflow dispatch.
  See #​650.

• Internal: removed the unused typeSocket assertion helper.
  See #​653.

• Internal: reorganized tests into test/unit/ and test/e2e/ directories
  and split the CI workflow into separate unit, e2e, and lint jobs.
  See #​651.

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