tslib not working for JSPM

[mhegazy]

Reported in #12724 (comment)

I am using JSPM, so I modified my tsconfig.json:

{
  "compilerOptions": {"baseUrl": ".",
     "paths": {
        "tslib": [ "jspm_packages/npm/tslib@1.2.0/tslib.d.ts" ]
     }, 

and compiler is now OK.

But there is a problem with runtime (Uncaught (in promise) Error: (SystemJS) tslib.__assign is not a function in Chrome).
tslib.js is correctly loaded, but its factory is never called.

jspm.config.js

SystemJS.config({
  paths: {
    "tslib": "jspm_packages/npm/tslib/tslib",

[mhegazy]

need to publish another version of tslib.