Support multiple master keys in one build #10

All 3 tests pass in 50s

27 files +27 27 suites +27 50s ⏱️ +50s
3 tests + 3 3 ✅ + 3 0 💤 ±0 0 ❌ ±0
27 runs +27 27 ✅ +27 0 💤 ±0 0 ❌ ±0

Results for commit 5ecdfd7. ± Comparison against earlier commit 0e7960d.