Add AsyncSource trait

This patch adds the AsyncSource trait, the interface for providing async
source functionality for this crate.

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>
Reviewed-by: Matthias Beyer <mail@beyermatthias.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 35b1ab3..5d0db61 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -23,6 +23,7 @@ ini = ["rust-ini"]
 json5 = ["json5_rs"]
 
 [dependencies]
+async-trait = "0.1.50"
 lazy_static = "1.0"
 serde = "1.0.8"
 nom = "6"