ocamlPackages.ppx_derivers: 1.0 -> 1.2

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/ocaml4.05.0-ppx_derivers/versions.

These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 1.2 with grep in /nix/store/1z3j5cy1fcy8f0qhb4vfhkqk83sayq3d-ocaml4.05.0-ppx_derivers-1.2
- directory tree listing: https://gist.github.com/7778f1cdaa30a426b29cad1badb930de

pkgs/development/ocaml-modules/ppx_derivers/default.nix

@@ -6,13 +6,13 @@ else
 
 stdenv.mkDerivation rec {
 	name = "ocaml${ocaml.version}-ppx_derivers-${version}";
-	version = "1.0";
+	version = "1.2";
 
 	src = fetchFromGitHub {
 		owner = "diml";
 		repo = "ppx_derivers";
 		rev = version;
-		sha256 = "049yy9706lv1li6a1bibkz1qq2ixxbdyhf4f5w9pv71jc3dlpfy8";
+		sha256 = "0bnhihl1w31as5w2czly1v3d6pbir9inmgsjg2cj6aaj9v1dzd85";
 	};
 
 	buildInputs = [ ocaml findlib jbuilder ];