cargo: relax stable dependency restrictions

ed7ad665 · Ben Boeckel · cc1e2c50 · ed7ad665
Commit ed7ad665 authored Mar 23, 2017 by Ben Boeckel
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ reqwest = "~0.4"
 serde = "~0.9"
 serde_derive = "~0.9"
 serde_json = "~0.9"
-url = "~1.4"
+url = "^1.4"

 [features]
 strict = []