Update gulp-uglify to version 2.1.0 🚀

[greenkeeperio-bot]

Hello lovely humans,

gulp-uglify just published its new version 2.1.0.

State	Update 🚀
Dependency	gulp-uglify
New version	2.1.0
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 gulp-uglify.
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.

Do you have any ideas how I could improve these pull requests? Did I report anything you think isn’t right?
Are you unsure about how things are supposed to work?

There is a collection of frequently asked questions and while I’m just a bot, there is a group of people who are happy to teach me new things. Let them know.

Good luck with your project ✨

You rock!

🌴

---

GitHub Release

Minor Fixes

• Updates UglifyJS to 2.8.10, and loosens version pinning to minor versions. See mishoo/UglifyJS2@v2.7.5...v2.8.10 for details of changes.

---

The new version differs by 17 commits .

• ec8ba54 fix(tests): UglifyJS errors use "message" property
• 6c336ec v2.1.0
• 35c33f1 chore(uglifyjs): loosen uglify-js pin
• 74b6eff 2.0.1
• 832b427 chore(package): update uglify-js to version 2.7.5
• 1bf0f72 docs(README): link to Why Use Pump?
• ccdc482 docs(pump): fix typo
• 5ddafd2 chore(package): update uglify-js to version 2.7.4
• d5801ca chore(greenkeeper): ignore "gulp-sourcemaps" dependency
• 129df84 chore(package.json): update repository field
• 533ee01 fix(package): update uglify-js to version 2.7.3
• 1f2c508 docs(why-use-pump): fix plugin name
• 2829956 docs(README): fix typo
• 48bc2e3 chore(package): update vinyl to version 2.0.0
• 2c8c5a3 chore(package): update uglify-js to version 2.7.1

There are 17 commits in total. See the full diff.

---

✨ Try the all new Greenkeeper GitHub Integration ✨
With Integrations first-class bot support landed on GitHub and we’ve rewritten Greenkeeper to take full advantage of it. Simpler setup, fewer pull-requests, faster than ever. Screencast Try it today. Free for private repositories during beta.

[coveralls]

Coverage increased (+0.3%) to 89.298% when pulling d16f1db on greenkeeper-gulp-uglify-2.1.0 into 020295b on master.

[instantlinux]

replaced by #458