Update typescript to version 2.5.2 🚀

[greenkeeper]

Version 2.5.2 of typescript just got published.

Dependency	typescript
Current Version	2.4.2
Type	dependency

The version 2.5.2 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 652 commits ahead by 652, behind by 75.

• 171c664 Update LKG
• 20da159 Merge pull request #18127 from RyanCavanaugh/port18120_release25
• 6425ea2 Don't crash when a JS file appears in an inferred context
• 6ffe829 Update LKG
• 15a0d3f Update version
• 2a2773f Update LKG
• 187a21c Fix crash in name resolution with custom transforms and emitDecoratorMetadata
• 62678cd Don't try to extract import to a method: simpler fix (#18054)
• 3644771 Test for action description of code actions, and simplify description for extracting method to file (#18030) (#18044)
• a39ae1f Fix crash when attempting to merge an import with a local declaration (#18032) (#18034)
• 350c9f6 Call dynamic import transform on expression used by export equal statement (#18028) (#18033)
• 0851f69 Added additional test
• 01b7df6 Switch to arrow for ts class wrapper IIFE
• 9bb1915 PR feedback
• ec8f5cf Follow symbol through commonjs require for inferred class type

There are 250 commits in total.

See the full diff

Not sure how things should work exactly?

There is a collection of frequently asked questions and of course you may always ask my humans.

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