Typo in code - system.src.js "transpier" should be "transpiler"

[josh-sachs]

Line 3668 of system.src.js:

 if (!transpiler.translate)
      throw new Error(loader.transpier + ' is not a valid transpiler plugin.');

should read loader.transpiler not loader.transpier

Still working on why plugin-typescript isn't recognized as a valid transpiler... obviously the translate property isn't getting set.

[guybedford]

Thanks added in eaa4292.

[guybedford]

Released in 0.20.7.