Bump serde dependencies and deny default features (#113)

This change makes `jsonptr` compatible with no-std environments.

Co-authored-by: Andrej Krakau <[email protected]>

Author: DeppLearning

Cargo.lock

@@ -17,8 +17,8 @@ version = "0.7.1"
 
 [dependencies]
 miette     = { version = "7.4.0", optional = true, features = ["fancy"] }
-serde      = { version = "1.0.203", optional = true, features = ["alloc"] }
-serde_json = { version = "1.0.119", optional = true, features = ["alloc"] }
+serde      = { version = "1.0.219", optional = true, default-features = false, features = ["alloc"] }
+serde_json = { version = "1.0.140", optional = true, default-features = false, features = ["alloc"] }
 toml       = { version = "0.8", optional = true }
 
 [dev-dependencies]