Update CI

[jeking3]

No description provided.

[codecov]

Codecov Report

Merging #40 into develop will increase coverage by 1.73%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop      #40      +/-   ##
===========================================
+ Coverage    77.15%   78.88%   +1.73%     
===========================================
  Files            5        5              
  Lines          604      611       +7     
  Branches       211      203       -8     
===========================================
+ Hits           466      482      +16     
  Misses          24       24              
+ Partials       114      105       -9

Impacted Files	Coverage Δ
include/boost/dynamic_bitset/dynamic_bitset.hpp	77.93% <0%> (+1.69%)	⬆️
...ude/boost/dynamic_bitset/detail/dynamic_bitset.hpp	96.77% <0%> (+3.22%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1b8b128...9d2e3fb. Read the comment docs.

[jeking3]

I opened #40 to track the gcc 4.8 regression in xenial. It is (for now) an allowed failure so we can make progress.