doc(changelog) Add #1949.

Author: Hywan

CHANGELOG.md

@@ -15,6 +15,9 @@
 
 ### Fixed
 
+- [#1949](https://github.com/wasmerio/wasmer/pull/1949) `wasm_<type>_vec_delete` functions no longer crash when the given vector is uninitialized, in the Wasmer C API
+- [#1949](https://github.com/wasmerio/wasmer/pull/1949) The `wasm_frame_vec_t`, `wasm_functype_vec_t`, `wasm_globaltype_vec_t`, `wasm_memorytype_vec_t`, and `wasm_tabletype_vec_t` are now boxed vectors in the Wasmer C API
+
 ## 1.0.0-beta2 - 2020-12-16
 
 ### Added