Cargo.toml: Set Rust 2018

Must have removed this accidentally after I generated the Rust scaffold.

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index ad3e032..cf539a5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,7 @@
 [package]
 name = "git-todo"
 version = "0.0.1"
+edition = "2018"
 
 [dependencies]
 git2 = "0.13.11"