Update typescript to the latest version 🚀

[greenkeeper[bot]]

Version 2.4.2 of typescript just got published.

Dependency	typescript
Current Version	2.4.1
Type	devDependency

The version 2.4.2 is not covered by your current version range.

Without accepting this pull request your project will work just like it did before. There might be a bunch of new features, fixes and perf improvements that the maintainers worked on for you though.

I recommend you look into these changes and try to get onto the latest version of typescript. Given that you have a decent test suite, a passing build is a strong indicator that you can take advantage of these changes by merging the proposed change into your project. Otherwise this branch is a great starting point for you to work on the update.

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Commits

The new version differs by 3 commits.

• 6105867 Bumped version to 2.4.2.
• a34cf58 Update the builder dependency graph only if it was created.
• 50abee3 Never return undefined from getExportsOfModule (#17019)

See the full diff

Not sure how things should work exactly?

There is a collection of [frequently asked questions](https://greenkeeper.io/faq.html) and of course you may always [ask my humans](https://github.com/greenkeeperio/greenkeeper/issues/new).

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Your Greenkeeper Bot :palm_tree:

[codecov-io]

Codecov Report

Merging #36 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #36   +/-   ##
=======================================
  Coverage   93.99%   93.99%           
=======================================
  Files          46       46           
  Lines        1133     1133           
  Branches      150      150           
=======================================
  Hits         1065     1065           
  Misses         39       39           
  Partials       29       29

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