Increment version number of idna to 1.0.3

Author: hsivonen

idna/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "idna"
-version = "1.0.2"
+version = "1.0.3"
 authors = ["The rust-url developers"]
 description = "IDNA (Internationalizing Domain Names in Applications) and Punycode."
 keywords = ["no_std", "web", "http"]