myst-parser: bump docutils version requirements

Author: smunix

docs/requirements.txt

@@ -1,4 +1,4 @@
 Sphinx==4.0.2
 sphinx-rtd-theme==0.5.2
 myst-parser==0.15.1
-docutils<0.17
+docutils<0.19

flake.nix

@@ -170,7 +170,14 @@
         pkgs = import nixpkgs {
           inherit system;
           overlays = [ self.overlay ];
-          config = { allowBroken = true; };
+          config = {
+            allowBroken = true;
+            packageOverrides = pkgs': {
+              python39 = pkgs'.python39.override {
+                packageOverrides = self: super: { docutils = super.python3Packages.callPackage ./docutils.nix {}; };
+              };
+            };
+          };
         };
 
         # Pre-commit hooks to run stylish-haskell