tracing-subscriber: Enable env-filter feature

Author: Turbo87

Cargo.lock

@@ -85,7 +85,7 @@ thiserror = "=1.0.30"
 tokio = { version = "=1.15.0", features = ["net", "signal", "io-std", "io-util", "rt-multi-thread", "macros"]}
 toml = "=0.5.8"
 tracing = "=0.1.29"
-tracing-subscriber = "=0.3.6"
+tracing-subscriber = { version = "=0.3.6", features = ["env-filter"] }
 url = "=2.2.2"
 
 [dev-dependencies]