Add benchmarks with boost.safe_numerics

[mborland]

Closes: #25

[codecov]

Codecov Report

❌ Patch coverage is 2.02020% with 97 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.0%. Comparing base (f9a29c2) to head (588a7c3).
⚠️ Report is 8 commits behind head on develop.

Files with missing lines	Patch %	Lines
test/benchmarks/benchmark_boost.cpp	2.1%	97 Missing ⚠️

❌ Your patch status has failed because the patch coverage (2.1%) is below the target coverage (90.0%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop     #41     +/-   ##
=========================================
- Coverage     98.9%   97.0%   -1.9%     
=========================================
  Files           84      85      +1     
  Lines         4772    4871     +99     
  Branches      1504    1547     +43     
=========================================
+ Hits          4719    4721      +2     
- Misses          24     121     +97     
  Partials        29      29             

Files with missing lines	Coverage Δ
test/benchmarks/benchmark_unsigned_operations.cpp	100.0% <ø> (ø)
test/benchmarks/benchmark_boost.cpp	2.1% <2.1%> (ø)

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f9a29c2...588a7c3. Read the comment docs.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.