v50.8.3

What's Changed

• feat: add registerPendingEnvironment method to Communication class by @barak007 in #2711
• refactor: remove get running feature by @barak007 in #2654
• feat(node-env-manager): add naive health check by @cylon3035 in #2712
• feat: remove @wixc3/engine-test-kit, @wixc3/testing by @AviVahl in #2715
• fix: prevent check for disposal of Window instances in removeMessageHandler by @barak007 in #2714

Full Changelog: v50.8.2...v50.8.3