Deliver password reset email asynchronously

Fixes a potential timing attack where someone could find out
whether an email address is in our database or not.

Use safe email functions

Fixes plausible#1545

Fix error with conversion rate

Ensure that question marks are encoded properly for the database

Adds test

Revert "Get fresh search console data"

This reverts commit 3ab19af.

Remove beta notice from the API keys section

Upgrade mailer dependency (plausible#899)

* Upgrade mailer dependency

* Changelog

Merge pull request plausible#655 from jonnitto/patch-1

Fix: Re-add hash and outbound-links only options

Do not allow duplicate spike notification to be created