Update apn to version 2.1.4 🚀

[greenkeeperio-bot]

Hello lovely humans,

apn just published its new version 2.1.4.

State	Update 🚀
Dependency	apn
New version	2.1.4
Type	dependency

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 apn.
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

• Don't mutate passed in payload object
• Change APNs development endpoint to api.development.push.apple.com
• Update node-http2 fork

---

The new version differs by 413 commits .

• f7456df Update changelog for 2.1.4
• adfc778 Update node-http2 fork
• a8422e0 fix typo
• f1d79cc Change endpoint name to match APNs definition
• c915b9a Update APN dev endpoint (#528)
• 5d6bfb4 avoid mutating given payload
• b4c31cb Update changelog for 2.1.3
• 7aab2f0 Update npm dependencies
• 61495d2 Merge pull request #480 from cmdkoh/master
• e0f7a54 Change _pingedThreshold to 2.5 times of headbeat
• 448b621 Update the document. (#509)
• 4671795 Fix documentation links
• 2d2c126 edit doc
• a01596b Update provider.markdown
• 19f4a85 Fixing incorrect docs (String -> Array)

There are 250 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.