Add getQuota method using imap_get_quotaroot to Connection class

[arkadiusjonczek]

As discussed in #421 I changed the requested code lines.
(Sorry I had to create a new PR because I deleted the old repository)

[arkadiusjonczek]

Would be nice if you could add a new release and update the composer package after merge. So I can use the changes in my application. 👍 :)

[arkadiusjonczek]

Waiting for your feedback @ddeboer @Slamdunk ;)

[Slamdunk]

Please be patient about feedback times: no one pays us for maintaining this library. Nice work though, here's my changes request:

[Slamdunk]

Note to self: working good against GMail:

array(3) {
  ["usage"]=>
  int(4665144)
  ["limit"]=>
  int(19922944)
  ["STORAGE"]=>
  array(2) {
    ["usage"]=>
    int(4665144)
    ["limit"]=>
    int(19922944)
  }
}

[Slamdunk]

Awesome work 👍 thank you

[Slamdunk]

Released in 1.9.0

[arkadiusjonczek]

Thank you my friend @Slamdunk 👍