conan: 1.12.3 -> 1.23.0

* remove pinned dependencies where nixpkgs provides a version
  in the acceptable range
* disable tests;
  they are no longer in the Pypi archive, see
  https://github.com/conan-io/conan/issues/4563

pkgs/development/tools/build-managers/conan/default.nix

@@ -1,5 +1,17 @@
 { lib, python3, git, pkgconfig }:
 
+# Note:
+# Conan has specific dependency demanands; check
+#     https://github.com/conan-io/conan/blob/master/conans/requirements.txt
+#     https://github.com/conan-io/conan/blob/master/conans/requirements_server.txt
+# on the release branch/commit we're packaging.
+#
+# Two approaches are used here to deal with that:
+# Pinning the specific versions it wants in `newPython`,
+# and using `substituteInPlace conans/requirements.txt ...`
+# in `postPatch` to allow newer versions when we know
+# (e.g. from changelogs) that they are compatible.
+
 let newPython = python3.override {
   packageOverrides = self: super: {
     distro = super.distro.overridePythonAttrs (oldAttrs: rec {
@@ -16,20 +28,6 @@ let newPython = python3.override {
         sha256 = "1dv6mjsm67l1razcgmq66riqmsb36wns17mnipqr610v0z0zf5j0";
       };
     });
-    future = super.future.overridePythonAttrs (oldAttrs: rec {
-      version = "0.16.0";
-      src = oldAttrs.src.override {
-        inherit version;
-        sha256 = "1nzy1k4m9966sikp0qka7lirh8sqrsyainyf8rk97db7nwdfv773";
-      };
-    });
-    tqdm = super.tqdm.overridePythonAttrs (oldAttrs: rec {
-      version = "4.28.1";
-      src = oldAttrs.src.override {
-        inherit version;
-        sha256 = "1fyybgbmlr8ms32j7h76hz5g9xc6nf0644mwhc40a0s5k14makav";
-      };
-    });
     pluginbase = super.pluginbase.overridePythonAttrs (oldAttrs: rec {
       version = "0.7";
       src = oldAttrs.src.override {
@@ -41,31 +39,34 @@ let newPython = python3.override {
 };
 
 in newPython.pkgs.buildPythonApplication rec {
-  version = "1.12.3";
+  version = "1.23.0";
   pname = "conan";
 
   src = newPython.pkgs.fetchPypi {
     inherit pname version;
-    sha256 = "1cnfy9b57apps4bfai6r67g0mrvgnqa154z9idv0kf93k1nvx53g";
+    sha256 = "06jnmgvzdyxjpcmyj1804mlq6b842jvvbsngsamdy976sqws870g";
   };
 
   propagatedBuildInputs = with newPython.pkgs; [
     bottle
     colorama
+    dateutil
     deprecation
     distro
     fasteners
     future
+    jinja2
     node-semver
-    patch
+    patch-ng
     pluginbase
     pygments
     pyjwt
-    pylint
+    pylint # Not in `requirements.txt` but used in hooks, see https://github.com/conan-io/conan/pull/6152
     pyyaml
     requests
     six
     tqdm
+    urllib3
   ];
 
   checkInputs = [
@@ -81,11 +82,11 @@ in newPython.pkgs.buildPythonApplication rec {
     webtest
   ]);
 
-  checkPhase = ''
-    export HOME=$TMPDIR
-    pytest conans/test/{utils,unittests} \
-      -k 'not SVN and not ToolsNetTest'
-  '';
+  # Conan 1.14.0 has removed all tests from the Pypi source dist:
+  #     https://github.com/conan-io/conan/pull/4713
+  # We have recommended they be added back:
+  #     https://github.com/conan-io/conan/issues/4563#issuecomment-602225083
+  doCheck = false;
 
   postPatch = ''
     substituteInPlace conans/requirements.txt \