Get messages by UID sequence

[LeadTechVisas]

I needed to get Messages based on an UID sequence. imap_search and imap_sort don't support that, apparently you have to use imap_fetch_overview.

I added a method to the Mailbox object that lets you get a MessageIterator based on a sequence of ids.

This allows you to store the id of the last message you read an then later read only messages with a higher id than that.

foreach ( $mailbox->getMessageSequence($lastImported . ':*') as $message ) {

[Slamdunk]

Nice proposal: take a look at the additional tests I've required, and run php-cs-fixer to fix the coding standards please 👍

[LeadTechVisas]

Thank you for the feedback. I just updated the PR.

[Slamdunk]

I think it is still missing the empty path, for example

$this->mailbox->getMessageSequence('99999:*')

[LeadTechVisas]

99999:* will not return an empty array. A sequence containing * will always return the last message, even if the starting UID is higher than the last one. I added a test for 99998:99999.