0.15.4 - Batten down the hatches

This release is all about squashing tiny flakes in the test suite (and tiny timing bugs in Docket!), as well as getting Docket's security posture up to snuff. This enables just about the full gamut of Github's automated security features.

What's Changed

• Fix test_task_announcements flake with immediate heartbeat by @chrisguidry in #216
• Update Dependabot configuration for package ecosystem by @chrisguidry in #217
• Fix concurrency slot release bug causing task overlap by @chrisguidry in #223
• Bump actions/download-artifact from 4 to 6 by @dependabot[bot] in #221
• Fix GitHub code scanning alerts by @chrisguidry in #224
• Add Docker test runner for reproducing CI timing issues by @chrisguidry in #225
• Deflake concurrency limit tests by @chrisguidry in #228
• CI fixes: timeouts, publish workflow, and chaos safety by @chrisguidry in #230
• Remove unnecessary build deps install from publish workflow by @chrisguidry in #231

New Contributors

• @dependabot[bot] made their first contribution in #221

Full Changelog: 0.15.3...0.15.4