Describe Rust version for devs (#1044)

Fixes #1042

README.md

@@ -48,7 +48,7 @@ We recommend downloading the latest application binary from [our Releases page](
 
 ## Running a development build
 
-First, [install Rust via `rustup`](https://www.rust-lang.org/tools/install). This project uses a lot of Rust compiled to [WASM](https://webassembly.org/) within it. Then, run:
+First, [install Rust via `rustup`](https://www.rust-lang.org/tools/install). This project uses a lot of Rust compiled to [WASM](https://webassembly.org/) within it. We always use the latest stable version of Rust, so you may need to run `rustup update stable`. Then, run:
 
 ```
 yarn install

src/wasm-lib/Cargo.toml

@@ -3,6 +3,7 @@ name = "wasm-lib"
 version = "0.1.0"
 edition = "2021"
 repository = "https://github.com/KittyCAD/modeling-app"
+rust-version = "1.73"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 [lib]

src/wasm-lib/derive-docs/Cargo.toml

@@ -5,6 +5,7 @@ version = "0.1.4"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/KittyCAD/modeling-app"
+rust-version = "1.73"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

src/wasm-lib/kcl/Cargo.toml

@@ -5,6 +5,7 @@ version = "0.1.35"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/KittyCAD/modeling-app"
+rust-version = "1.73"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

src/wasm-lib/kcl/fuzz/Cargo.toml

@@ -4,6 +4,7 @@ version = "0.0.0"
 publish = false
 edition = "2021"
 repository = "https://github.com/KittyCAD/modeling-app"
+rust-version = "1.73"
 
 [package.metadata]
 cargo-fuzz = true