fix: make std enable serde-json-core/heapless

Signed-off-by: Kaspar Schleiser <[email protected]>

Author: kaspar030

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Fixed
+
+- Make `std` enable `serde-json-core`'s `heapless` feature
+
 ## [0.6.2]
 
 ### Changed

Cargo.lock

@@ -31,7 +31,7 @@ default = ["semihosting", "panic-handler"]
 semihosting = ["dep:semihosting"]
 
 # use std functionality
-std = []
+std = ["serde-json-core/heapless"]
 
 # defines a panic-handler which will invoke `semihosting::process::abort()` on panic
 panic-handler = []