Ensure test_npsupport passes with numpy>=2.0.0 by explicitly setting dtype=numpy.int32. (#859)

* Ensure explicit `dtype` in `test_npsupport.py` for clarity and consistency.

* Update `numpy` installation in `autotest` workflow.
- Remove version constraint for numpy installation in `.github/workflows/autotest.yml`.
  This allows using the latest numpy version in CI tests.

Author: junkmd

.github/workflows/autotest.yml

@@ -30,7 +30,7 @@ jobs:
       - name: unittest comtypes
         run: |
           if ("${{ matrix.support }}" -eq "with 3rd parties") {
-            pip install 'numpy<2'
+            pip install numpy
             pip install pywin32
           }
           pip install coverage[toml]

comtypes/test/test_npsupport.py

@@ -182,7 +182,7 @@ def test_VT_BSTR_ndarray(self):
     def test_VT_I4_ndarray(self):
         t = _midlSAFEARRAY(c_long)
 
-        in_arr = numpy.array([11, 22, 33])
+        in_arr = numpy.array([11, 22, 33], dtype=numpy.int32)
         sa = t.from_param(in_arr)
 
         arr = get_ndarray(sa)