MNT: Drop Python 3.8 and numpy 1.21 support (NEP29) (#3052)

Author: effigies

.github/workflows/stable.yml

@@ -28,7 +28,7 @@ jobs:
     strategy:
       matrix:
         os: ['ubuntu-latest']
-        python-version: [3.8, 3.9, '3.10', '3.11']
+        python-version: [3.9, '3.10', '3.11']
         install: ['pip']
         check: ['tests']
         pip-flags: ['']

pyproject.toml

@@ -18,16 +18,15 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
 ]
 license = {file = "LICENSE"}
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 dependencies = [
-    'importlib_resources; python_version < "3.9"',
     "looseversion",
     "nibabel >= 4.0.1",
     "nipype >= 1.8.5",
     "nitime",
     "nitransforms >= 21.0.0",
     "niworkflows @ git+https://github.com/nipreps/niworkflows.git@master",
-    "numpy",
+    "numpy >= 1.22",
     "packaging",
     "pandas",
     "psutil >= 5.4",