bump version to 1.0.4

Author: brotzeit

rust-mode.el

@@ -1,6 +1,6 @@
 ;;; rust-mode.el --- A major-mode for editing Rust source code -*-lexical-binding: t-*-
 
-;; Version: 1.0.3
+;; Version: 1.0.4
 ;; Author: Mozilla
 ;; Url: https://github.com/rust-lang/rust-mode
 ;; Keywords: languages