xregexp@3.1.0 breaks build 🚨

[greenkeeperio-bot]

Hello 👋

🚨🚨🚨

xregexp just published its new version 3.1.0, which is covered by your current version range. After updating it in your project the build went from success to failure.

This means your software is now malfunctioning, because of this update. Use this branch to work on adaptions and fixes.

Happy fixing and merging 🌴

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The new version differs by 36 commits .

• bbd5b1c Add v3.1.0 to perf test versions
• 314c78d Update version number to 3.1.0
• d26006e Readme updates for next release
• 0b13ca0 Fix edge case bug with XRegExp.build and flag n. Closes #68.
• f546542 In XRegExp.build subpatterns, don't treat $ as trailing when followed only by escaped symbols
• 69e552b Remove giant token cleanup regex and deal with problem directly in XRegExp.build
• 57b3172 Add comments marking use of XRegExp.install('natives') as deprecated
• cc189dd Remove unneeded uses of addY during internal copy
• e07f42b Undo earlier change since Chrome supports ES6 'unicode' getter but not flag 'u' in construction
• ca3b8db npm run build
• 300157f Merge pull request #122 from syntaxhighlighter/master
• 6c127d3 Adds missing ;
• bc41e9f Merge pull request #124 from slevithan/simplify
• 15465fd Simplify native flag support detection
• a82af2c Updates the package to use CommonJS and Browserify for the build

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

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