v2.6.2

Improvements

• perf: Remove unnecessary boundary protection in children diffing by @pmdartus in #2595
• feat: add observability for renderMode/shadowMode by @nolanlawson in #2587
• fix(engine-server): fix CustomEvent polyfill in Node 16 by @nolanlawson in #2591

Internal

• chore: enable Nucleus for all PRs by @nolanlawson in #2586
• chore: Remove useless dependency on esutils by @pmdartus in #2585
• chore: add more required downstream deps to nucleus by @nolanlawson in #2588
• chore: show proper TypeScript error messages by @nolanlawson in #2593
• chore: Cleanup unused types by @pmdartus in #2594
• chore(nucleus): remove LCT/lightning-container-testing by @nolanlawson in #2599
• test: increase benchmark run time for fast tests by @nolanlawson in #2596
• test: add test for snabbdom mutating old children by @nolanlawson in #2602
• fix(synthetic-shadow): convert getRootNode test into regression test by @jye-sf in #2601
• chore: update deps by @abdulsattar in #2605

Full Changelog: v2.6.1...v2.6.2