update docstrings

Author: crusaderky

src/array_api_extra/_delegation.py

@@ -31,8 +31,8 @@ def _delegate(xp: ModuleType, *backends: Backend) -> bool:
 
 
 def isclose(
-    a: Array,
-    b: Array,
+    a: Array | complex,
+    b: Array | complex,
     *,
     rtol: float = 1e-05,
     atol: float = 1e-08,

src/array_api_extra/_lib/_funcs.py

@@ -642,7 +642,7 @@ def setdiff1d(
 
     Parameters
     ----------
-    x1 : array
+    x1 : array | int | float | complex | bool
         Input array.
     x2 : array
         Input comparison array.