gnu: libpepadapter: Update to 2.1.19.

* pep/nightly.scm (libpepadapter): Update to 2.1.19. [source]: Change to
  git repo.

pEp/nightly.scm

@@ -157,16 +157,16 @@ privacy).")
 (define-public libpepadapter
   (package
     (name "libpepadapter")
-    (version "2.1.3")
+    (version "2.1.19")
     (source
      (origin
-       (method hg-fetch)
-       (uri (hg-reference
-             (url "https://pep.foundation/dev/repos/libpEpAdapter")
-             (changeset "a14df349ffca"))) ;; changeset 386
-       (file-name (string-append name "-" version "-checkout"))
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://gitea.pep.foundation/pEp.foundation/libpEpAdapter")
+             (commit (string-append "Release_" version))))
+       (file-name (git-file-name name version))
        (sha256
-        (base32 "0w71wp70liidgha2s81pfdy0m10hgi948v9x2k47i6lslqap68vf"))))
+        (base32 "11qlg9mbz0izwg5qghdq0sk20j29rlhs1d6x2j6yb190w83101l8"))))
     (build-system gnu-build-system)
     (arguments
      '(#:test-target "test"