python3Packages.mautrix: 0.3.11 -> 0.4.0

Previously known as `mautrix-appservice`. For backwards-compatibility, I
added an alias in `python-packages.nix`.

Additionally a small patch was needed which I already filed upstream[1].

Please note that the package switched from a MIT license to the Mozilla
Public License[2].

[1] https://github.com/tulir/mautrix-python/pull/13
[2] https://github.com/tulir/mautrix-python/blob/v0.4.0/LICENSE

pkgs/development/python-modules/mautrix/default.nix

@@ -0,0 +1,43 @@
+{ lib, buildPythonPackage, fetchPypi, aiohttp, future-fstrings, pythonOlder
+, sqlalchemy, ruamel_yaml, CommonMark, lxml, fetchpatch
+}:
+
+buildPythonPackage rec {
+  pname = "mautrix";
+  version = "0.4.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "03m59d683nr547v5xr80wc3j07das2d2sc3i4bf03dpbkfg0h17w";
+  };
+
+  patches = [
+    (fetchpatch {
+      url = "https://github.com/tulir/mautrix-python/commit/ac46f3bb1bea11d22d8a486cc4821604c844da5e.patch";
+      sha256 = "198g63s0iv8g1w22g4g5hb54y41ws82wraglibz33qhrwsfn8axn";
+    })
+  ];
+
+  propagatedBuildInputs = [
+    aiohttp
+    future-fstrings
+
+    # defined in optional-requirements.txt
+    sqlalchemy
+    ruamel_yaml
+    CommonMark
+    lxml
+  ];
+
+  disabled = pythonOlder "3.5";
+
+  # no tests available
+  doCheck = false;
+
+  meta = with lib; {
+    homepage = https://github.com/tulir/mautrix-python;
+    description = "A Python 3 asyncio Matrix framework.";
+    license = licenses.mpl20;
+    maintainers = with maintainers; [ nyanloutre ma27 ];
+  };
+}