dependencies: bumped not pinned dependency venusian to 1.2.0

pkgs/python-packages.nix

@@ -859,11 +859,11 b' self: super: {'
     };
   };
   "venusian" = super.buildPythonPackage {
-    name = "venusian-1.1.0";
+    name = "venusian-1.2.0";
     doCheck = false;
     src = fetchurl {
-      url = "https://files.pythonhosted.org/packages/38/24/b4b470ab9e0a2e2e9b9030c7735828c8934b4c6b45befd1bb713ec2aeb2d/venusian-1.1.0.tar.gz";
-      sha256 = "0zapz131686qm0gazwy8bh11vr57pr89jbwbl50s528sqy9f80lr";
+      url = "https://files.pythonhosted.org/packages/7e/6f/40a9d43ac77cb51cb62be5b5662d170f43f8037bdc4eab56336c4ca92bb7/venusian-1.2.0.tar.gz";
+      sha256 = "0ghyx66g8ikx9nx1mnwqvdcqm11i1vlq0hnvwl50s48bp22q5v34";
     };
     meta = {
       license = [ { fullName = "BSD-derived (http://www.repoze.org/LICENSE.txt)"; } ];