remove np.int and np.float (#3295)

Fixes #3113
- np.int and np.float is deprecated and will not work for numpy 1.20+
- Changed np.int in RDKit tests to np.int32 and np.int64

testsuite/MDAnalysisTests/coordinates/test_rdkit.py

@@ -434,9 +434,11 @@ def test_standardize_patterns(self, smi, out):
 
     @pytest.mark.parametrize("attr, value, getter", [
         ("index", 42, "GetIntProp"),
-        ("index", np.int(42), "GetIntProp"),
+        ("index", np.int32(42), "GetIntProp"),
+        ("index", np.int64(42), "GetIntProp"),
         ("charge", 4.2, "GetDoubleProp"),
-        ("charge", np.float(4.2), "GetDoubleProp"),
+        ("charge", np.float32(4.2), "GetDoubleProp"),
+        ("charge", np.float64(4.2), "GetDoubleProp"),
         ("type", "C.3", "GetProp"),
     ])
     def test_set_atom_property(self, attr, value, getter):