Bug/999 Fix `keepdim` in `any`/`all`

[neosunhan]

Description

keepdim=True now works in any/all when axis=None

Issue/s resolved: #999

Changes proposed:

• If axis=None, set axis to a tuple of all dimensions. This is equivalent to performing a reduction over all dimensions.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Due Diligence

• [ ] All split configurations tested
• [ ] Multiple dtypes tested in relevant functions
• [ ] Documentation updated (if needed)
• [ ] Updated changelog.md under the title "Pending Additions"

Does this change modify the behaviour of other functions? If so, which?

no

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Legend

[codecov[bot]]

Codecov Report

Merging #1000 (3d8b207) into main (d5c14b7) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1000   +/-   ##
=======================================
  Coverage   91.67%   91.68%           
=======================================
  Files          65       65           
  Lines        9974     9978    +4     
=======================================
+ Hits         9144     9148    +4     
  Misses        830      830           

Flag	Coverage Δ
unit	91.68% <100.00%> (+<0.01%)	:arrow_up:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
heat/core/logical.py	100.00% <100.00%> (ø)

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