dlpack v0.4

[DvirDukhan]

this PR upgrades to dlpack v0.4
closes #610

[codecov]

Codecov Report

Merging #614 (253860d) into master (9fe3b7d) will increase coverage by 0.03%.
The diff coverage is 96.87%.

@@            Coverage Diff             @@
##           master     #614      +/-   ##
==========================================
+ Coverage   74.33%   74.36%   +0.03%     
==========================================
  Files          39       39              
  Lines        6062     6062              
==========================================
+ Hits         4506     4508       +2     
+ Misses       1556     1554       -2     

Impacted Files	Coverage Δ
src/libtorch_c/torch_c.cpp	57.89% <85.71%> (ø)
src/backends/onnxruntime.c	61.02% <100.00%> (ø)
src/backends/tensorflow.c	70.50% <100.00%> (ø)
src/libtflite_c/tflite_c.cpp	58.17% <100.00%> (ø)
...c/serialization/RDB/decoder/current/v1/decode_v1.c	64.63% <100.00%> (ø)
.../serialization/RDB/decoder/previous/v0/decode_v0.c	61.39% <100.00%> (ø)
src/serialization/RDB/encoder/v1/encode_v1.c	78.18% <100.00%> (ø)
src/tensor.c	76.77% <100.00%> (ø)
src/background_workers.c	80.55% <0.00%> (+1.38%)	⬆️

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