Move typescript and @types/node to devDependencies

[avasilic]

I’ve noticed that tatsu is including typescript and @types/node in dependencies (not devDependencies) of its package.json. I'm bringing this up because this package only has nine files but has a size of around 69MB when installed.

Since typescript and @types/node are typically only needed during development and not in production, I wanted to suggest moving these dependencies to devDependencies to reduce the size of the package when installed.