Update systemjs-builder to version 0.15.8 🚀

[greenkeeperio-bot]

Hello :wave:

:rocket::rocket::rocket:

systemjs-builder just published its new version 0.15.8, which is not covered by your current version range.

If this pull request passes your tests you can publish your software with the latest version of systemjs-builder – otherwise use this branch to work on adaptions and fixes.

Happy fixing and merging :palm_tree:

---

The new version differs by 364 commits .

• f89b08e 0.15.8
• 419c20c ensure external depMap merging through rollup optimization (#476)
• 386eab4 adjust rollup global dep test to catch canonicalize
• 0bb778b rollup global dep test
• 675590c fix stack ordering
• d72141b better compiler errors
• 37bcdb2 support spaces in module names
• 2997116 use strict decanonicalize for builder instead of reverting defaultJSExtensions
• cfb05fb fix typescript loading bug
• d0915a2 simplify invalid import message
• 8f91d05 0.15.7
• 8a57f36 shift sourceMap build sanitization into builder
• 0c8e88d ensure inlining for non-rollup
• a91433b ensure # in paths is supported
• fd71dbc only skip extensions for non-canonicalized

There are 250 commits in total. See the full diff.

---

This pull request was created by greenkeeper.io. It keeps your software, up to date, all the time.

_{Tired of seeing this sponsor message? Upgrade to the supporter plan! You'll also get your pull requests faster :zap:}