add ispy to the api

Author: Christopher Doris

src/API/exports.jl

@@ -1,4 +1,5 @@
 # Core
+export ispy
 export pyis
 export pyrepr
 export pyascii

src/API/functions.jl

@@ -12,6 +12,7 @@ function getptr end
 function pydel! end
 function unsafe_pynext end
 
+function ispy end
 function pyis end
 function pyrepr end
 function pyascii end

src/Core/Core.jl

@@ -37,6 +37,7 @@ import ..PythonCall:
     getptr,
     pydel!,
     unsafe_pynext,
+    ispy,
     pyis,
     pyrepr,
     pyascii,

src/Core/Py.jl

@@ -9,7 +9,6 @@ True if `x` is a Python object.
 This includes `Py` and Python wrapper types such as `PyList`.
 """
 ispy(x) = false
-export ispy
 
 """
     pyisnull(x)