ci(bump): bump nix version to avoid certificate error

diff --git a/.travis.yml b/.travis.yml
index 31c3ecf49469fc8403430144f54fa94a0d60af52..c4b3194d147c08f02cc84c00015666dcc0543c14 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 ---
 language: nix
-nix: 2.3.4
+nix: 2.3.6
 env:
   - CUSTOM_NIX_PATH=nixpkgs=channel:nixos-20.09