moved psutil from test dep to core dep

Author: tclose

pyproject.toml

@@ -14,6 +14,7 @@ dependencies = [
     "filelock >=3.0.0",
     "fileformats >=0.15.0a7",
     "platformdirs >=2",
+    "psutil >=5.9.0",
 ]
 license = { file = "LICENSE" }
 authors = [{ name = "Nipype developers", email = "neuroimaging@python.org" }]
@@ -78,7 +79,6 @@ test = [
     "fileformats-extras >=0.15.0a7",
     "numpy >=1.26",
     "pyld >=2.0",
-    "psutil >=5.9.0",
     "python-dateutil >=2.8.2",
     "tornado >=6.1",
 ]