fixup unknown command, document commands

1 files changed, 1 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 4ed3e44..b9009be 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,5 @@
 #![feature(try_blocks)]
+#![feature(let_chains)]
 
 #[cfg(feature = "db")]
 pub mod db;