Dependency Update

Removes an unused dependency, changes a polyfill, and updates the CRT submodules to newer versions for latest improvements.

What's Changed

• Remove unused 'ws' dependency by @trivikr in #337
• Update CONTRIBUTING to reflect how CI works in our repos by @TwistedTwigleg in #340
• Slight adjustment to CONTRIBUTING wording by @TwistedTwigleg in #341
• Use browser polyfills from @aws-sdk/util-utf8-browser (mirror) by @TwistedTwigleg in #339
• Updated CRT submodules to latest releases by @TwistedTwigleg in #342

New Contributors

• @trivikr made their first contribution in #337

Full Changelog: v1.13.0...v1.13.1