gnu: python-stpipe: Update to 0.5.2.

* gnu/packages/astronomy.scm (python-stpipe): Update to 0.5.2.
[source]: Add snippet adjusting references to configobj.

Change-Id: I213f4d082757813db1652b7189348fb9ddd527b6

gnu/packages/astronomy.scm

@@ -3412,13 +3412,22 @@ implemented in the @acronym{JWST, James Webb Space Telescope} and
 (define-public python-stpipe
   (package
     (name "python-stpipe")
-    (version "0.5.1")
+    (version "0.5.2")
     (source (origin
               (method url-fetch)
               (uri (pypi-uri "stpipe" version))
               (sha256
                (base32
-                "11ccb3v2s20lf851061s4nanljwm9s9xzkcfgb3qhv0hjwziq0vr"))))
+                "0r29m143ll1j9irixazrkqggzg9xbkcw7fl9xmi69zpxbh5mjgz0"))
+              (modules '((guix build utils)))
+              (snippet
+               '(begin
+                  ;; Replace reference to external configobj.
+                  (substitute* (find-files "." "\\.py$")
+                    (("from astropy.extern import configobj") "import configobj")
+                    (("from astropy.extern.configobj import validate") "import validate")
+                    (("from astropy.extern.configobj.configobj import ") "from configobj import ")
+                    (("from astropy.extern.configobj.validate import ") "from validate import "))))))
     (arguments
      (list
       ;; See https://github.com/spacetelescope/stpipe/issues/114