Update gleam_json dependency constraint

[giacomocavalieri]

No description provided.

[lpil]

What's the motivation here? I thought we were deliberately holding back on this one?

[giacomocavalieri]

Oops sorry I had no idea it was being intentionally held back. My problem is I ran into dependency resolution errors trying to add lustre_dev_tools as a dependency:

> gleam new wibble
> cd wibble
> gleam add lustre
> gleam add lustre_dev_tools --dev

error: Dependency resolution failed

An error occurred while determining what dependency packages and
versions should be downloaded.
The error from the version resolver library was:

Unable to find compatible versions for the version constraints in your
gleam.toml. The conflicting packages are:

- wibble
- lustre_dev_tools
- wisp
- gleam_json

The error message is not super useful but I thought the problem might be with wisp being too restrictive with the constraint.