avoid syntax error in .d.ts when the module names end up long (#273)

It is not legal typescript to wrap a `declare module "foo/bar" {` statement - this is a SyntaxError.  as such, we need to `self.emit()` this statement instead of `self.emit_wrapped_text()`.

stone/backends/tsd_types.py

@@ -249,7 +249,7 @@ def _generate_types(self, namespace, spaces_per_indent, extra_args):
         if namespace.doc:
             self._emit_tsdoc_header(namespace.doc)
 
-        self.emit_wrapped_text(self._get_top_level_declaration(namespace.name))
+        self.emit(self._get_top_level_declaration(namespace.name))
 
         with self.indent(dent=spaces_per_indent):
             for data_type in data_types: