Update sources, default to 4.10 (#52)

Author: anmonteiro

.github/workflows/test.yml

@@ -9,10 +9,10 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ocamlVersion: [4_07, 4_08, 4_09, 4_10]
+        ocamlVersion: [4_08, 4_09, 4_10]
     steps:
     - uses: actions/checkout@v2
-    - uses: cachix/install-nix-action@v7
+    - uses: cachix/install-nix-action@v8
     - uses: cachix/cachix-action@v5
       with:
         name: anmonteiro

nix/sources.nix

@@ -1,9 +1,9 @@
-{ ocamlVersion ? "4_09" }:
+{ ocamlVersion ? "4_10" }:
 
 let
   overlays = builtins.fetchTarball {
-    url = https://github.com/anmonteiro/nix-overlays/archive/f8221f0.tar.gz;
-    sha256 = "098rpjbykp7ffhs62mgxlk7349l665xh1w1m8ldj6rjb690cc945";
+    url = https://github.com/anmonteiro/nix-overlays/archive/9ebb27af.tar.gz;
+    sha256 = "0qlq4g96scz1lqsiyprkggjnzhxga07csqjc75ax1j1kk1ich34i";
   };
 
 in