change IRC MessageType to be a bitflag instead of enum

the BufferSyncer object uses this type in a bitflag manner to indicate
all the kinds of change that happened. bitflag still allows very enum
esque usage so the change is okay for the Message object.

1 files changed, 2 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 41a88e6..620f4e0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,6 +21,8 @@ time = "0.2"
 num-traits = "0.2"
 num-derive = "0.3"
 
+bitflags = "1"
+
 itertools = "0.10"
 
 libquassel-derive = { path = "./derive" }