Add dev-dependency on serde_json to ensure serde tests are independent of json feature flag

Author: Hendrik van Antwerpen

stack-graphs/Cargo.toml

@@ -39,6 +39,7 @@ thiserror = { version="1.0" }
 itertools = "0.10"
 maplit = "1.0"
 pretty_assertions = "0.7"
+serde_json = { version="1.0" }
 
 [package.metadata.docs.rs]
 all-features = true

stack-graphs/tests/it/serde.rs

@@ -5,12 +5,9 @@
 // Please see the LICENSE-APACHE or LICENSE-MIT files in this distribution for license details.
 // ------------------------------------------------------------------------------------------------
 
-#[cfg(feature = "json")]
 use stack_graphs::graph;
-#[cfg(feature = "json")]
 use stack_graphs::serde;
 
-#[cfg(feature = "json")]
 #[test]
 fn serde_json_stack_graph() {
     let expected = serde::StackGraph {
@@ -131,7 +128,6 @@ fn serde_json_stack_graph() {
     assert_eq!(observed, expected);
 }
 
-#[cfg(feature = "json")]
 #[test]
 fn reconstruct() {
     let json_data = serde_json::json!(