MNT: Add py312-dev-x64 environment

[effigies]

cc @larsoner

[larsoner]

Also need to add an entry to

nibabel/.github/workflows/test.yml

Lines 113 to 128 in e356408

	include:
	# Basic dependencies only
	- os: ubuntu-latest
	python-version: 3.8
	dependencies: 'none'
	# Absolute minimum dependencies
	- os: ubuntu-latest
	python-version: 3.8
	dependencies: 'min'
	exclude:
	- os: ubuntu-latest
	architecture: x86
	- os: macos-latest
	architecture: x86
	- python-version: '3.12'
	architecture: x86

, no?

I think a single run of NP2.0 is enough

[larsoner]

Happy to push CI changes here if you want

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (adcc9ba) 92.19% compared to head (98489b5) 92.22%.
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1267      +/-   ##
==========================================
+ Coverage   92.19%   92.22%   +0.02%     
==========================================
  Files          99       99              
  Lines       12458    12454       -4     
  Branches     2559     2559              
==========================================
  Hits        11486    11486              
+ Misses        648      644       -4     
  Partials      324      324              

see 1 file with indirect coverage changes

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[larsoner]

Seems to be failing as intended!

https://github.com/nipy/nibabel/actions/runs/6562773154/job/17825525527?pr=1267#step:7:62

E   AttributeError: `np.sctypes` was removed in the NumPy 2.0 release. . Did you mean: 'dtypes'?

[larsoner]

@effigies feel free to merge and then we can see if #1250 fixes things