lmdbjava/lmdbjava#174 Uplift jnr-ffi to v2.2.2

[at055612]

Fixes #174

[codecov-io]

Codecov Report

Merging #175 (c1a9ed0) into master (8230623) will decrease coverage by 0.14%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #175      +/-   ##
============================================
- Coverage     91.21%   91.06%   -0.15%     
+ Complexity      383      382       -1     
============================================
  Files            30       30              
  Lines          1343     1343              
  Branches        116      116              
============================================
- Hits           1225     1223       -2     
- Misses           57       58       +1     
- Partials         61       62       +1     

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/org/lmdbjava/ByteBufProxy.java	81.13% <0.00%> (-3.78%)	11.00% <0.00%> (-1.00%)

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[benalexau]

Thanks @at055612