update cargo.toml in python crate and fix unit test due to hash joins

[jimexist]

Which issue does this PR close?

update cargo.toml in python crate

related #481

Closes #.

Rationale for this change

What changes are included in this PR?

Are there any user-facing changes?

[codecov-commenter]

Codecov Report

Merging #483 (1b61af3) into master (33ff660) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #483   +/-   ##
=======================================
  Coverage   75.80%   75.80%           
=======================================
  Files         153      153           
  Lines       25924    25924           
=======================================
  Hits        19652    19652           
  Misses       6272     6272           

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[jorgecarleitao]

LGTM

[jorgecarleitao]

@jimexist , could we consider reverting this PR? I do not think that this is correct: DataFusions' behavior of returning 4 record batches when evaluated over a record batch of 3 entries seems wrong to me.

[jorgecarleitao]

I flagged this in #523 , and I think that we should address this on the DataFusion side and not on the python bindings (i.e. concatenating the arrays).

[jorgecarleitao]

Scratch the above, Python should keep the tests as is. If anything, we need to address this on DataFusion, but this PR is great as is. Sorry for the noise.