Release v0.83.0

What's Changed

• Community build: model broken packages & add new ones by @jiribenes in #1479
• Switch order of Mono & Show passes by @mattisboeckle in #1465
• Add hex int syntax by @mattisboeckle in #1403
• Implement lambda set specialization by @b-studios in #1480
• Multi-arity Returns by @b-studios in #1481
• Effective Rays is not broken anymore? by @b-studios in #1482
• Share one instance per nullary constructor in the JS backend by @b-studios in #1487
• Add Zahn's construct from Knuth as an example by @jiribenes in #1490
• Community build: add linguistic effects by @jiribenes in #1484
• Fix broken links on the website by @jiribenes in #1492
• Add 'unreachable' to LLVM, assume switch is well-formed by @jiribenes in #1455
• Fix crash on allocation into region after resume on Chez CPS by @jiribenes in #1494
• Fix 'unreachable' on Chez by throwing correct error by @jiribenes in #1496
• Make Chez CPS runtime faster by @jiribenes in #1497
• Improve code generation on Chez by @jiribenes in #1499
• Use fast numeric types on Chez by @jiribenes in #1500
• Share a singleton instance per nullary constructor on Chez by @jiribenes in #1502

Full Changelog: v0.82.0...v0.83.0