WIP fix(bundler): fix commonjs node id compatibility.

[3cp]

Commonjs thinks "foo" and "foo.js" are same id, but AMD thinks they are two different ids. Passing nodeIdCompat: true to requirejs config to improve compatibility to whole range of commonjs packages. Ref: amodrojs/amodro-trace#7

[3cp]

This solves date-fns bundling issue.

There is another issue related to date-fns.
au import date-fns doesn't work, the importer/strategies/amodro rejected it because of missing main in package.json.

I think it is quite safe to use "index.js" as the default value of package.main, because that's how nodejs deals with missing "main" anyway. @JeroenVinke I can make another PR if you agree to do so.

[JeroenVinke]

@huochunpeng thanks for the PR, i'll have a look

about using index.js as default, I think that should be fine since it's the last one, but I would prefer if we could check to see if that file exists before trying to execute the strategy

[3cp]

Sure, to ease my setup, I will create PR for that after this one is merged.

[3cp]

nodeIdCompat only fixes requrejs setup, not systemjs.

systemjs/systemjs#1807

[3cp]

There is complication in test. All apps need to update aurelia-karma.js in order to run test normally.
Which means this is a breaking change.

Plus this doesn't help on systemjs setup.

I am working on a better solution.

[3cp]

obsoleted by #862