Update nodemailer to version 3.1.2 🚀

[greenkeeperio-bot]

Hello lovely humans,

nodemailer just published its new version 3.1.2.

State	Update 🚀
Dependency	nodemailer
New version	3.1.2
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 nodemailer.
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!

🌴

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The new version differs by 46 commits .

• 0097988 v3.1.2
• cca3b8c Add error handling for SES and sendmail tranports for failing messages
• 315eb22 v3.1.1
• aba7bd6 Added missing transport.on('idle') and transport.isIdle() for SES transports
• 689f834 v3.1.0
• 3c3d920 Supress Message-ID and Date in DKIM headers when using SES
• 8819548 updated message-id handling for SES
• 645dd95 Merge branch 'master' of github.com:nodemailer/nodemailer
• 5cadb3f Initial support for SES
• 1ceab54 Added some missing tests for icalEvent
• d78b63b Added test for json transport
• fd7aeff Merge branch 'master' of github.com:nodemailer/nodemailer
• 7a6b10b Updated README
• 2112ef3 Added new transport to generate processed JSON data from input
• f4b5190 Added a test to send mail to server with no auth

There are 46 commits in total. See the full diff.

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