fix: print class type parameters

[jycouet]

The TS ClassDeclaration/ClassExpression printer never visits node.typeParameters, so a generic class class Foo<T> {} round-trips to class Foo {} (the <T> is silently lost). superTypeParameters on extends were handled, but the class's own type parameters were missing.

if (node.id) {
	context.visit(node.id);
}

if (node.typeParameters) {
	context.visit(node.typeParameters); // added
}

if (node.id || node.typeParameters) {
	context.write(' ');
}

Found while migrating Svelte code via sveltejs/cli, where reserializing untouched classes stripped generics.

Includes a test and a changeset.

[changeset-bot]

🦋 Changeset detected

Latest commit: cecd914

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
esrap	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR