Announcing Unified CI with Go 1.18 and JS support

Highlights

• 👑 Go 1.18 is out! Go workflows will use Go 1.17 and Go 1.18 from now on. Testing with Go 1.16 is being dropped.
• ♻️ Automerge is becoming reusable! This will allow us to keep improving the workflow even in-between major Unified CI releases.
• 🔧 Automerge in JS is fixed! The workflow will start to work correctly in JS repositories even if some checks are skipped.
• 🛣️ PATH for go test on 386 is customisable! Go test workflow will now support PATH customisation for the step running on 32 bit machines.