*: bump 0.5.4 (#476)

Signed-off-by: Xintao <hunterlxt@live.com>
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 009ee23..b15e61a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 0.5.4 - 2020-07-23
+
+- Add user-defined callback to `EnvBuilder` (#474)
+
 # 0.5.3 - 2020-05-07
 
 - Switch to github action and update badge
diff --git a/Cargo.toml b/Cargo.toml
index 5da2baf..dc663a4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "grpcio"
-version = "0.5.3"
+version = "0.5.4"
 edition = "2018"
 authors = ["The TiKV Project Developers"]
 license = "Apache-2.0"
diff --git a/src/channel.rs b/src/channel.rs
index 7301fcb..3e58f3c 100644
--- a/src/channel.rs
+++ b/src/channel.rs
@@ -391,7 +391,7 @@
     }
 
     /// Build `ChannelArgs` from the current configuration.
-    #[allow(clippy::identity_conversion)]
+    #[allow(clippy::useless_conversion)]
     pub fn build_args(&self) -> ChannelArgs {
         let args = unsafe { grpc_sys::grpcwrap_channel_args_create(self.options.len()) };
         for (i, (k, v)) in self.options.iter().enumerate() {