Update educe requirement from 0.6.0 to 0.7.4 (#446)

Author: loongs-zhang

Cargo.toml

@@ -32,7 +32,7 @@ mio = { version = "1.0", default-features = false }
 
 cfg-if = "1.0.0"
 polling = "2.8.0"
-educe = "0.6.0"
+educe = "0.7.4"
 
 libc = "0.2"
 rand = "0.10"