Update pep-engine to 2.1.0-rc27.

pEp/nightly.scm

@@ -104,16 +104,16 @@ shell provides options to redirect the output into a pipe or a file.")
 (define-public pep-engine
   (package
     (name "pep-engine")
-    (version "2.1.0-rc20")
+    (version "2.1.0-rc27")
     (source
      (origin
        (method hg-fetch)
        (uri (hg-reference
 	     (url "https://pep.foundation/dev/repos/pEpEngine")
-	     (changeset "9a265604e55b"))) ;; r4872
+	     (changeset "c3e10511c29e"))) ;; r4980
        (file-name (string-append name "-" version "-checkout"))
        (sha256
-	(base32 "0727mc3jsxv1sl42hav1cfgvz0gijz00xz70npip2grjx91kw3id"))))
+	(base32 "1z3yrxf1irdapxmikmf2rzpcn7c969060w342dk5z282gszalw4q"))))
     (build-system gnu-build-system)
     (arguments
      '(#:parallel-build? #f