Abseil and RE2 upgrade test

[Anilm3]

No description provided.

[codecov-commenter]

Codecov Report

Merging #215 (90e8585) into master (27ad2b7) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #215   +/-   ##
=======================================
  Coverage   82.43%   82.43%           
=======================================
  Files         106      106           
  Lines        4003     4003           
  Branches     1823     1823           
=======================================
  Hits         3300     3300           
  Misses        281      281           
  Partials      422      422           

Flag	Coverage Δ
waf_test_none	82.32% <100.00%> (ø)
waf_test_sse2	82.40% <100.00%> (ø)

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Files Changed	Coverage Δ
src/context_allocator.hpp	73.91% <ø> (ø)
src/object_store.hpp	83.33% <100.00%> (ø)

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