Allow version tags in aliases

[Hypercubed]

Here is PR for allowing version tags in aliases for your review.

Note: I had a hard time compiling this for testing. I was seeing many TS errors that I needed to hack around. What is your build process? Can we add that to the package scripts?

[Hypercubed]

Here are my TS fixes: https://github.com/Hypercubed/jspm-cli/tree/fix/ts-issues

Not sure if you need these.

[guybedford]

Amazing! Please add yourself to CONTRIBUTORS if not already - https://github.com/jspm/jspm-cli/blob/master/CONTRIBUTORS.

Also the TypeScript fixes would be great to include either in this PR or another. I usually run the build with vscode so that's why that folder is checked in.

[guybedford]

I'm not sure I follow this part since install.target is supposed to be the registry:name@version thing right? So in jspm install @x=x, the install.target should be the npm:x part right? Not the @x part? It's been a while since I've looked at this code, so maybe you can clarify this for me?

[Hypercubed]

This was not really necessary for this PR. This was a refactor to reduce some redundant code while I was debugging.

[Hypercubed]

@guybedford Did you see the changes here: https://github.com/Hypercubed/jspm-cli/tree/fix/ts-issues? Not sure if or how this was working previously.... but I need that to run the tests.

[Hypercubed]

I updated this PR including the changes I need to get TS to run.

[guybedford]

Published in 2.0.0-beta.5. Thanks so much for the ts build fixes too. Usually we don't commit the build changes, and only do that for release, but it was fine here.

[jbanety]

Hi,
This PR introduces some bugs.

Command :
jspm build $(jspm trace --deps ./public/src/app.js) -h --dir ./public/dist -o ./public/dist/deps-buildmap.json

Error raised :

err (jspm) TypeError: Function has non-object prototype 'undefined' in instanceof check   
    at Function.[Symbol.hasInstance] (<anonymous>)    
    at isRecord (/jspm/lib/build/index.js:40:18)   
    at Object.build (/jspm/lib/build/index.js:43:9)   
    at cliHandler (/jspm/lib/cli.js:602:44)   
    at Object.<anonymous> (/jspm/lib/cli.js:699:5)   
    at Module._compile (internal/modules/cjs/loader.js:776:30)   
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:787:10)   
    at Module.load (internal/modules/cjs/loader.js:653:32)   
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)     
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)

[guybedford]

@jbanety thanks for reporting - I believe this should be fixed in #2482.

[guybedford]

Released in 2.0.0-beta.6.

[Hypercubed]

Oof... that was a half completed change. Thanks!