gleam.toml allows any 0.x.x version of stdlib

[DynamicCake]

Right now in main, gleam.toml specifies gleam_stdlib as gleam_stdlib = ">= 0.44.0 and < 2.0.0". This is a problem because semver versioned 0.x.x packages can have breaking changes; because gleam_stdlib is a semver 0.x.x package, gleam_stdlib can have breaking changes and breaking changes break the library unexpectedly.

Even though it can be a bit troublesome, I think it is worth carefully constraining the version when a major release happens instead of having such a broad range.

[DynamicCake]

tfw I forget what a lockfile is for so this isn't that important. I still think we should have a ~> version specified instead.