avoid syntax error in .d.ts when the module names end up long

[dgoldstein0]

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().

Checklist

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• Code Change
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[codecov]

Codecov Report

Merging #273 (73c30a1) into main (9600065) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #273   +/-   ##
=======================================
  Coverage   52.02%   52.02%           
=======================================
  Files          37       37           
  Lines        8458     8458           
  Branches     1810     1810           
=======================================
  Hits         4400     4400           
  Misses       3741     3741           
  Partials      317      317           

Flag	Coverage Δ
unit	52.02% <100.00%> (ø)

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Impacted Files	Coverage Δ
stone/backends/tsd_types.py	37.91% <100.00%> (ø)

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