Ignore false matches from CoffeeScript codebase

I'm not sure this is the best fix for this bug, which was hard to track down! But I have also attempted to address it here: https://github.com/evanw/node-source-map-support/pull/283… although looking at the activity on that repo, I don't have much hope of it being merged any time soon… Hence the reason for this PR.

See also: evanw/node-source-map-support#254
# Conflicts:
#	lib/util.js

Author: surjikal

dist/source-map.debug.js

@@ -1150,7 +1150,9 @@ return /******/ (function(modules) { // webpackBootstrap
 	 * JSON.
 	 */
 	function parseSourceMapInput(str) {
-	  return JSON.parse(str.replace(/^\)]}'[^\n]*\n/, ''));
+	  // Ignore false matches from CoffeeScript codebase.
+	  if (str.startsWith('zw(u')) return { version: 3, sources: [], mappings: [] }
+	  return JSON.parse(str.replace(/^\)]}'[^\n]*\n/, ""));
 	}
 	exports.parseSourceMapInput = parseSourceMapInput;