message: doc(changelog) Add missing entries
diff: ## **[Unreleased]**
  ### Added
  +- [#2154](https://github.com/wasmerio/wasmer/pull/2154) Implement reference types in the LLVM compiler.
  +- [#2103](https://github.com/wasmerio/wasmer/pull/2103) Add middleware (incl. metering) in the C API.
  +- [#2003](https://github.com/wasmerio/wasmer/pull/2003) Wasmer works with musl, and is built, tested and packaged for musl.
  +- [#2116](https://github.com/wasmerio/wasmer/pull/2116) Add a package for Windows that is not an installed, but all the `lib` and `include` files as for macOS and Linux.
  - [#2153](https://github.com/wasmerio/wasmer/pull/2153) Add a `wasmer_features_t` unstable C API to define features for the engine and the compiler in the Wasm C API.
  - [#2123](https://github.com/wasmerio/wasmer/pull/2123) Use `ENABLE_{{compiler_name}}=(0|1)` to resp. force to disable or enable a compiler when running the `Makefile`, e.g. `ENABLE_LLVM=1 make build-wasmer`.
  - [#2123](https://github.com/wasmerio/wasmer/pull/2123) `libwasmer` comes with all available compilers per target instead of Cranelift only.
  - [#2135](https://github.com/wasmerio/wasmer/pull/2135) [Documentation](./PACKAGING.md) for linux distribution maintainers
  ### Changed
  +- [#2140](https://github.com/wasmerio/wasmer/pull/2140) Reduce the number of dependencies in the `wasmer.dll` shared library by statically compiling CRT.
  - [#2113](https://github.com/wasmerio/wasmer/pull/2113) Bump minimum supported Rust version to 1.49
  - [#2144](https://github.com/wasmerio/wasmer/pull/2144) Bump cranelift version to 0.70
  - [#2149](https://github.com/wasmerio/wasmer/pull/2144) `wasmer-engine-native` looks for clang-11 instead of clang-10.
  ### Fixed
  +- [#2108](https://github.com/wasmerio/wasmer/pull/2108) The Object Native Engine generates code that now compiles correctly with C++.
  +- [#2125](https://github.com/wasmerio/wasmer/pull/2125) Fix RUSTSEC-2021-0023.
  +- [#2155](https://github.com/wasmerio/wasmer/pull/2155) Fix the implementation of shift and rotate in the LLVM compiler.
  - [#2117](https://github.com/wasmerio/wasmer/pull/2117) Formalize API prefixes in the C API. Only unstable functions have been renamed.
  - [#2097](https://github.com/wasmerio/wasmer/pull/2097) Fix how string's length is computed in `wasm_cpu_features_add` in the C API.
  - [#2101](https://github.com/wasmerio/wasmer/pull/2101) cflags emitted by `wasmer config --pkg-config` are now correct.
  