Bump env_logger dev-dependency

Cargo.toml

@@ -27,7 +27,7 @@ cfg-if = "1.0.0"
 heapless = "0.7.8"
 
 [dev-dependencies]
-env_logger = "0.9"
+env_logger = "0.10"
 getopts = "0.2"
 rand = "0.8"
 url = "2.0"