Update dependencies, remove unused heck dependency (#894)

* Store tracked struct ids as Vec on Revisions

* Use reserve

* Discard changes to tests/parallel/cycle_a_t1_b_t2_fallback.rs

* Try boxed slice

* Use thinvec

* Update dependencies, remove unused heck

* Discard changes to src/function/diff_outputs.rs

* Discard changes to src/tracked_struct.rs

* Discard changes to src/zalsa_local.rs

* Discard changes to tests/parallel/cycle_a_t1_b_t2_fallback.rs

Author: MichaReiser

components/salsa-macros/Cargo.toml

@@ -12,8 +12,7 @@ description = "Procedural macros for the salsa crate"
 proc-macro = true
 
 [dependencies]
-heck = "0.5.0"
 proc-macro2 = "1.0"
 quote = "1.0"
-syn = { version = "2.0.64", features = ["full", "visit-mut"] }
-synstructure = "0.13.1"
+syn = { version = "2.0.101", features = ["full", "visit-mut"] }
+synstructure = "0.13.2"