chore: update README.md and CHANGELOG.md (#18)

Author: dsgallups

CHANGELOG.md

@@ -6,6 +6,9 @@
     - Thanks @rksm!
 - notes: the addition of `origin_base_url` implies that `WasmLayerConfig` is no longer copy.
 
+### Changed
+- `set_as_global_default_with_config` now returns a Result. This will fail if the global default is already set.
+
 ### Removed
 - `WASMLayerConfig` and `WASMLayer` type aliases. Use `WasmLayerConfig` and `WasmLayer`, respectively.
 

README.md

@@ -20,6 +20,13 @@ Leverage performance profiling with your browser tools with the [tracing crate](
 
 Note: `wasm_tracing` uses the global JavaScript `console` and `performance` objects. It will not work in environments where one or both of these are not available, such as Node.js or Cloudflare Workers.
 
+
+## TODOs
+These features are things I'd like to do with `wasm-tracing`. Suggestions, comments, and complaints are encouraged!
+Please file an issue if you are passionate about a particular use-case or implementation detail.
+- [ ] Traces from `#[tracing::instrument]` macro should be visible in the console
+- [ ] Rewrite how the config works, possibly dependent/mirrored by another `tracing` crates' config w/ console specifics
+
 ## Usage
 
 For the simplest out of the box set-up, you can simply set `wasm_tracing` as your default tracing Subscriber in wasm_bindgen(start)