Add .mailmap

[marcinslusarz]

This change is 

[krzycz]

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Reviewed 1 of 1 files at r1. Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable

[codecov[bot]]

Codecov Report

Merging #440 into master will decrease coverage by 0.05%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #440      +/-   ##
==========================================
- Coverage   78.89%   78.84%   -0.06%     
==========================================
  Files          71       71              
  Lines        8815     8815              
  Branches     1775     1775              
==========================================
- Hits         6955     6950       -5     
- Misses       1412     1413       +1     
- Partials      448      452       +4

Flag	Coverage Δ
#ltp_tests	45.7% <ø> (-0.08%)	:arrow_down:
#sqlite_tests	45.71% <ø> (-0.02%)	:arrow_down:
#tests_antool	15.05% <ø> (ø)	:arrow_up:
#tests_posix_multi_threaded	25.22% <ø> (-0.09%)	:arrow_down:
#tests_posix_single_threaded	57.06% <ø> (+0.02%)	:arrow_up:
#tests_preload	44.69% <ø> (+0.03%)	:arrow_up:

Impacted Files	Coverage Δ
src/libpmemfile-posix/rename.c	91.09% <0%> (-0.81%)	:arrow_down:
src/libpmemfile-posix/write.c	87.08% <0%> (-0.48%)	:arrow_down:
src/libpmemfile-posix/data.c	94.48% <0%> (-0.4%)	:arrow_down:
src/libpmemfile-posix/inode.c	88.74% <0%> (-0.34%)	:arrow_down:

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