Refactor simplex to use wrapper class handling bound and fixed parameters #215

All 763 tests pass, 18 skipped in 4m 47s

4 files ±0 124 suites ±0 4m 47s ⏱️ +3s
781 tests ±0 763 ✅ ±0 18 💤 ±0 0 ❌ ±0
2 220 runs ±0 2 184 ✅ ±0 36 💤 ±0 0 ❌ ±0

Results for commit f8497bc. ± Comparison against earlier commit a7a4772.