update to Rust 2018 edition

* specify 2018 edition in the manifest
* changes to fix build with 2018 edition

1 files changed, 2 insertions, 0 deletions

diff --git a/src/irq.rs b/src/irq.rs
index 727fd7d..12534f1 100644
--- a/src/irq.rs
+++ b/src/irq.rs
@@ -1,6 +1,8 @@
 //! Shared interrupt description and set-up code.
 //! See the `bits*::irq` modules for arch-specific portions.
 
+use bitflags::*;
+
 use core::fmt;
 
 /// x86 Exception description (see also Intel Vol. 3a Chapter 6).