Revert bumping of minor ver of deps

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

Author: NobodyXu

Cargo.toml

@@ -36,15 +36,15 @@ process-mux = []
 native-mux = ["openssh-mux-client"]
 
 [dependencies]
-tempfile = "3.3.0"
+tempfile = "3.1.0"
 shell-escape = "0.1.5"
 tokio = { version = "1", features = [ "process", "io-util", "macros" ] }
-tokio-pipe = "0.2.11"
+tokio-pipe = "0.2.8"
 
-libc = "0.2.121"
+libc = "0.2.112"
 io-lifetimes = "0.6"
 
-once_cell = "1.10.0"
+once_cell = "1.8.0"
 dirs = "4.0.0"
 
 openssh-mux-client = { version = "0.15.0", optional = true }