Disable warnings from deprecated numeric_limits members (clang version)

[pps83]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.2%. Comparing base (6f3c75c) to head (ecb7de7).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop    #740     +/-   ##
=========================================
- Coverage     96.2%   96.2%   -0.0%     
=========================================
  Files          300     300             
  Lines        31384   31384             
=========================================
- Hits         30176   30174      -2     
- Misses        1208    1210      +2     

Files with missing lines	Coverage Δ
include/boost/multiprecision/cpp_int/limits.hpp	100.0% <ø> (ø)

... and 1 file with indirect coverage changes

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[mborland]

LGTM. Thank you!