Add mailcache module for async loading and caching of mails

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

1 files changed, 3 insertions, 0 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 66fe450..f04bf9c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,4 +18,7 @@ cursive           = "0.15"
 git = "https://github.com/matthiasbeyer/cursive_tree_view"
 branch = "update-deps"
 
+[dependencies.async-std]
+version          = "1.6"
+features         = ["unstable"]