Update babel-plugin-istanbul to version 4.1.1 🚀

[greenkeeperio-bot]

Hello lovely humans,

babel-plugin-istanbul just published its new version 4.1.1.

State	Update 🚀
Dependency	babel-plugin-istanbul
New version	4.1.1
Type	devDependency

This version 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 babel-plugin-istanbul.
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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Are you unsure about how things are supposed to work?

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Good luck with your project ✨

You rock!

🌴

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The new version differs by 36 commits .

• eeb3328 chore(release): 4.1.1
• db8ecbe fix: explicit upgrade to patched version of istanbul-lib-instrument
• 4a0261d chore(release): 4.1.0
• 2be51d4 chore: explicit update of istanbul dependencies (#98)
• b078bbd feat: add includeUntested option to expose coverage of all instrumented files (#80)
• ac8abab chore(release): 4.0.0
• e902924 fix: load configuration from process.env.NYC_CONFIG if present (#93)
• f77db2a feat: we can now use the language feature Object.assign (#92)
• 80afed9 docs(readme): add Greenkeeper badge 🌴 (#89)
• 594c03a feat: drop Node 0.10 and 0.12 support, upgrade dependencies to reflect this (#88)
• f0b8d7e chore(package): update test-exclude to version 4.0.0 (#86)
• 86c1c09 chore(release): 3.1.2
• f870a8f fix: address regression related to export const foo = () => {} (#79)
• 73a4247 chore: explicitly upgrade istanbul-lib-instrument
• 9818c25 chore(release): 3.1.1

There are 36 commits in total. See the full diff.

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