Added support for NullArray at FFI.

[jorgecarleitao]

No description provided.

[codecov]

Codecov Report

Merging #598 (6f0892e) into main (3caa204) will decrease coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #598      +/-   ##
==========================================
- Coverage   79.19%   79.18%   -0.02%     
==========================================
  Files         400      400              
  Lines       24885    24891       +6     
==========================================
+ Hits        19708    19709       +1     
- Misses       5177     5182       +5     

Impacted Files	Coverage Δ
src/array/null.rs	34.37% <0.00%> (-3.56%)	⬇️
src/ffi/array.rs	60.00% <0.00%> (+7.82%)	⬆️
src/io/parquet/read/mod.rs	31.60% <0.00%> (-1.02%)	⬇️
src/bitmap/utils/slice_iterator.rs	92.53% <0.00%> (+1.49%)	⬆️

---

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 3caa204...6f0892e. Read the comment docs.