Fix exception when parsing text emails

[snowl]

When parsing a text email, there is a scenario where the ArrayBuffer needs to be initialized from scratch instaed from the readable stream. We need to use new ArrayBuffer instead of just ArrayBuffer otherwise an exception is thrown.

(Sorry for the minified image)

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[andris9]

Thanks for noticing. I can't accept PRs without a CLA. If you are not willing to sign it (see the comment above), then let me know, and I'll fix the bug myself.

[andris9]

Closing as I can not merge without a CLA. Fixed the issue in v2.2.2 myself.

[snowl]

Sorry, I didn't see your comments. Thank you for fixing it :)