wip In package.json travis script add --trace-warnings

When build runs on travis we get a warning:
(node:5723) Warning: Accessing non-existent property 'VERSION' of module exports inside circular dependency
307(Use `node --trace-warnings ...` to show where the warning was created)kj

This is an attempt to diagnose this issue.

package.json

@@ -28,7 +28,7 @@
 		"lint": "grunt lint",
 		"test": "grunt",
 		"test:tap": "mocha --reporter tap",
-		"travis": "nyc --reporter lcovonly mocha",
+		"travis": "NODE_OPTIONS=--trace-warnings nyc --reporter lcovonly mocha",
 		"watch": "grunt watch",
 		"develop": "grunt all watch --force",
 		"strip": "./scripts/strip.js",