Preserve MSRV

Cargo.toml

@@ -13,11 +13,11 @@ categories = ["config"]
 
 [features]
 env = ["parse-value"]
-json = ["dep:serde_json"]
-yaml = ["dep:serde_yaml"]
-parse-value = ["dep:pear"]
-test = ["dep:tempfile", "dep:parking_lot"]
-toml = ["dep:toml_edit"]
+json = ["serde_json"]
+parse-value = ["pear"]
+test = ["tempfile", "parking_lot"]
+toml = ["toml_edit"]
+yaml = ["serde_yaml"]
 
 [dependencies]
 serde = "1.0"