dependencies: bumped not pinned dependency pluggy to 0.8.1

pkgs/python-packages.nix

@@ -446,11 +446,11 b' self: super: {'
     };
   };
   "pluggy" = super.buildPythonPackage {
-    name = "pluggy-0.8.0";
+    name = "pluggy-0.8.1";
     doCheck = false;
     src = fetchurl {
-      url = "https://files.pythonhosted.org/packages/65/25/81d0de17cd00f8ca994a4e74e3c4baf7cd25072c0b831dad5c7d9d6138f8/pluggy-0.8.0.tar.gz";
-      sha256 = "1580p47l2zqzsza8jcnw1h2wh3vvmygk6ly8bvi4w0g8j14sjys4";
+      url = "https://files.pythonhosted.org/packages/38/e1/83b10c17688af7b2998fa5342fec58ecbd2a5a7499f31e606ae6640b71ac/pluggy-0.8.1.tar.gz";
+      sha256 = "05l6g42p9ilmabw0hlbiyxy6gyzjri41m5l11a8dzgvi77q35p4d";
     };
     meta = {
       license = [ pkgs.lib.licenses.mit ];