python2.7-filelock: Init version 3.2.1 for Python 2

This adds filelock 3.2.1, the last version that still supports Python 2.

This fixes nixops, as it still was dependent on filelock for Python 2.
See #145109.

pkgs/development/python-modules/filelock/3.2.nix

@@ -0,0 +1,18 @@
+{ lib, buildPythonPackage, fetchPypi }:
+
+buildPythonPackage rec {
+  pname = "filelock";
+  version = "3.2.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1qry67zv2pmz8px6wdfbjqv75nmryy2ac7asqgs6q6db2722kpcw";
+  };
+
+  meta = with lib; {
+    homepage = "https://github.com/benediktschmitt/py-filelock";
+    description = "A platform independent file lock for Python";
+    license = licenses.unlicense;
+    maintainers = with maintainers; [ henkkalkwater ];
+  };
+}