Upgrade Handlebars to v1.3.0

[aljimenez]

All tests pass.

• Handlebars v1.3.0 docs
• Handlebars v1.3.0 tag

[yahoocla]

CLA is valid!

[okuryu]

Cool, That's something that I've always wanted to do. BTW, it should push into dev-3.x instead of dev-master?

[aljimenez]

I am not sure which branch it should be merged into but the previous handlebar upgrades merged into dev-master. Let me know if there are any questions about the pull request; the solution was a little tricky since handlebars' code has been refactored to ES6 modules which get transpiled to nodejs modules that include 'require' statements. The modified grunt file takes this into consideration and removes require statements and wraps each module in an anonymous function. This should work with future releases of handlebars, with little or no changes to the grunt file.

[okuryu]

the solution was a little tricky since handlebars' code has been refactored to ES6 modules which get transpiled to nodejs modules that include 'require' statements.

Yeah, I've tried to do this before too, but I ran into this problem, and I was wondering what the best way is.

At present, the original Handlebars hasn't built YUI format module.
https://github.com/wycats/handlebars.js/blob/a601b24a7320d2348f6b34693c4918dc08875737/Gruntfile.js#L44-76

So I think we should contiribute to transpiling to YUI format module first on handlebars repository, and then work on YUI core module repository, but before that we have to update es6-module-transpiler, which es6-module-packager is dependent on, to the latest version.
https://github.com/kpdecker/es6-module-packager/issues/5

Or, I think we may be able to transpile from the original Handlebars to YUI module by using es6-module-transpiler after importing Handlebars source code.

Because there are a few issues in order to solve everything, if the tests are passed, I personally think this approach is fine.

[okuryu]

I hope some feedback on this from Reviewers.

@ericf @caridy @rgrove @lsmith

[okuryu]

#1961 has been merged. It will be more latest Handlebars version.