Update jest-vue-preprocessor to the latest version 🚀

[greenkeeper]

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Version 2.0.0 of jest-vue-preprocessor was just published.

Dependency	jest-vue-preprocessor
Current Version	1.3.1
Type	devDependency

The version 2.0.0 is not covered by your current version range.

If you don’t accept this pull request, your project will work just like it did before. However, you might be missing out on a bunch of new features, fixes and/or performance improvements from the dependency update.

It might be worth looking into these changes and trying to get this project onto the latest version of jest-vue-preprocessor.

If you have a solid test suite and good coverage, a passing build is a strong indicator that you can take advantage of these changes directly by merging the proposed change into your project. If the build fails or you don’t have such unconditional trust in your tests, this branch is a great starting point for you to work on the update.

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Release Notes

v2.0.0

2.0.0 (2018-03-13)

• Support for Functional Components (#50) (c0c0590)

BREAKING CHANGES

• none, but in the future $el should be
  defined, as it can't be used for testing if it's
  undefined

• fix(test): behaves differently locally

test behaves differently on travis-ci than
on my local machine, so now there is a test
to document that

• none

• fix(test): typeof didn't work

tried to use typeof, decided to use
casting

no breaking changes

• fix(testing): removed context

context is needed for mounting functional components
but not as an option for a render function

no breaking changes

• fix(testing): iie -> function

was passing an expression not a function
to onClick handler

no breaking changes

• fix(testing): properly call props.onClick

1. need to pass props in context object to Vue.compile
2. need '@click="props.onClick('stuff')" VS
   '@click="() => props.onClick('stuff')"

No breaking changes

• test(local): can't reproduce locally

can't reproduce $el.querySelector being defined
locally, yet on travis-ci it's defined.
Without it being defined I can't debugger and
figure out what the mock function isn't being called.

• none; objeys all test criteria
  except for testing that mockFn was called

Commits

The new version differs by 5 commits.

• df9d528 ci(travis): Remove yarn installation on travis (#54)
• 75d5f37 chore(node): Update node engines in package.json to 8.9 (#53)
• c0c0590 Support for Functional Components (#50)
• 1df50d7 Show message from Babel (#45)
• 8fec8a2 Update prettier settings (#40)

See the full diff

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