chore(tox): Use uv_resolution to run minimum tests

tox.ini

@@ -5,6 +5,7 @@
 [tox]
 requires =
   tox>=4
+  tox-uv
 envlist =
   # No preinstallations
   py3{9,10,11,12,13,13t}-none
@@ -71,41 +72,40 @@ set_env =
   dev: PIP_ONLY_BINARY=numpy,scipy,h5py
   !dev: PIP_ONLY_BINARY=numpy,scipy,h5py,pillow,matplotlib
   pre,dev: PIP_EXTRA_INDEX_URL=https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
-  pre,dev: UV_INDEX=https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
-extras = test
+  pre,dev: UV_EXTRA_INDEX_URL=https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
+  py313t: PYTHONGIL=0
+extras =
+  test
+
+  # Simple, thanks pillow
+  !none: dicomfs
+  !none: indexed_gzip
+
+  # Matplotlib has wheels for everything except win32 (x86)
+  {min,full,pre,dev}-{x,arm}64: viewers
+
+  # Nightly, but not released cp313t wheels for: scipy
+  # When released, remove the py3* line and add min/full to the pre,dev line
+  py3{9,10,11,12,13}-{min,full}-{x,arm}64: spm
+  {pre,dev}-{x,arm}64: spm
+
+  # No cp313t wheels for: h5py, pyzstd
+  py3{9,10,11,12,13}-{min,full,pre-dev}-{x,arm}64: minc2
+  py3{9,10,11,12,13}-{min,full,pre-dev}-{x,arm}64: zstd
+
+  # No win32 wheels for scipy/matplotlib after py39
+  py39-full-x86: spm
+  py39-full-x86: viewers
+
 deps =
-  # General minimum dependencies: pin based on API usage
-  # matplotlib 3.5 requires packaging 20
-  min: packaging ==20
-  min: importlib_resources ==5.12; python_version < '3.12'
-  min: typing_extensions ==4.6; python_version < '3.13'
-  # NEP29/SPEC0 + 1yr: Test on minor release series within the last 3 years
-  # We're extending this to all optional dependencies
-  # This only affects the range that we test on; numpy is the only non-optional
-  # dependency, and will be the only one to affect pip environment resolution.
-  min: numpy ==1.22
-  min: h5py ==3.5
-  min: indexed_gzip ==1.6
-  min: matplotlib ==3.5
-  min: pillow ==8.4
-  min: pydicom ==2.3
-  min: pyzstd ==0.15.2
-  min: scipy ==1.8
   # Numpy 2.0 is a major breaking release; we cannot put much effort into
   # supporting until it's at least RC stable
   dev: numpy >=2.1.dev0
-  # Scipy stopped producing win32 wheels at py310
-  py39-full-x86,x64,arm64: scipy >=1.8
-  # Matplotlib depends on scipy, so cannot be built for py310 on x86
-  py39-full-x86,x64,arm64: matplotlib >=3.5
-  # h5py stopped producing win32 wheels at py39
-  {full,pre}-{x64,arm64}: h5py >=3.5
-  full,pre,dev: pillow >=8.4
-  full,pre: indexed_gzip >=1.6
-  full,pre,dev: pyzstd >=0.15.2
-  full,pre: pydicom >=2.3
   dev: pydicom @ git+https://github.com/pydicom/pydicom.git@main
 
+uv_resolution =
+  min: lowest-direct
+
 commands =
   pytest --doctest-modules --doctest-plus \
     --cov nibabel --cov-report xml:cov.xml \