Demo build failing + Example module decode error

Would love to write macros using watt, it's very exciting. Can't get anything to work unfortunately, following the demo or the example pattern in the readme.

# Demo broken

```
watt/demo/impl on  master is 📦 v0.0.0 via 🦀 v1.75.0
❯ cargo build --release --target wasm32-unknown-unknown
```

```
Updating crates.io index
Compiling proc-macro2 v1.0.75 (/Users/wbrickner/Downloads/watt/proc-macro)
Compiling unicode-ident v1.0.12
Compiling quote v1.0.35
Compiling syn v2.0.48
error[E0277]: `proc_macro2::LexError` doesn't implement `std::fmt::Display`
--> /Users/wbrickner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/syn-2.0.48/src/error.rs:407:32
|
407 | Error::new(err.span(), err)
| ---------- ^^^ `proc_macro2::LexError` cannot be formatted with the default formatter
| |
| required by a bound introduced by this call
|
= help: the trait `std::fmt::Display` is not implemented for `proc_macro2::LexError`
= note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
note: required by a bound in `error::Error::new`
--> /Users/wbrickner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/syn-2.0.48/src/error.rs:158:19
|
158 | pub fn new(span: Span, message: T) -> Self {
| ^^^^^^^ required by this bound in `Error::new`

For more information about this error, try `rustc --explain E0277`.
error: could not compile `syn` (lib) due to previous error
```

# Example Code

Following the guide in the readme exactly, I get the wasm to build, but then at the invocation site of the shim (`my_macro!()`) I get a panic with a module decode error. This originates in the shim, on `WasmMacro::new`.

```
ts_test on  master [?] is 📦 v0.1.0 via 🦀 v1.75.0
❯ cargo check
Compiling type_set v0.1.0 (/Users/wbrickner/Documents/Projects/type_set/new/type_set)
Checking ts_test v0.1.0 (/Users/wbrickner/Documents/Projects/type_set/new/ts_test)
error: proc macro panicked
--> src/main.rs:3:1
|
3 | the_macro!();
| ^^^^^^^^^^^^
|
= help: message: called `Result::unwrap()` on an `Err` value: DecodeModuleFailed

error: could not compile `ts_test` (bin "ts_test") due to previous error
```

Thank for all the work you guys are doing for the ecosystem, it's amazing!

Start by reproducing the two failures: run `cargo build --release --target wasm32-unknown-unknown` in `watt/demo/impl`, then follow the README example through the shim's `WasmMacro::new`. Check the reported dependency compilation error and the module decode failure; done means the demo builds and the example macro invocation completes without `DecodeModuleFailed`.

Written by the indexing model from the issue text.