Add PHP 8.2 support, drop PHP 8.0 support

[codecov[bot]]

Codecov Report

Base: 95.58% // Head: 94.76% // Decreases project coverage by -0.82% :warning:

Coverage data is based on head (4a395ca) compared to base (1a0a86e). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #553 +/- ## ============================================ - Coverage 95.58% 94.76% -0.83% + Complexity 357 356 -1 ============================================ Files 45 45 Lines 839 898 +59 ============================================ + Hits 802 851 +49 - Misses 37 47 +10 ``` | [Impacted Files](https://codecov.io/gh/ddeboer/imap/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=David+de+Boer) | Coverage Δ | | |---|---|---| | [src/ImapResource.php](https://codecov.io/gh/ddeboer/imap/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=David+de+Boer#diff-c3JjL0ltYXBSZXNvdXJjZS5waHA=) | `93.10% <100.00%> (-3.68%)` | :arrow_down: | | [src/Mailbox.php](https://codecov.io/gh/ddeboer/imap/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=David+de+Boer#diff-c3JjL01haWxib3gucGhw) | `96.52% <100.00%> (-0.60%)` | :arrow_down: | | [src/Search/AbstractDate.php](https://codecov.io/gh/ddeboer/imap/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=David+de+Boer#diff-c3JjL1NlYXJjaC9BYnN0cmFjdERhdGUucGhw) | `100.00% <100.00%> (ø)` | | | [src/Connection.php](https://codecov.io/gh/ddeboer/imap/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=David+de+Boer#diff-c3JjL0Nvbm5lY3Rpb24ucGhw) | `84.21% <0.00%> (-4.53%)` | :arrow_down: | | [src/Message.php](https://codecov.io/gh/ddeboer/imap/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=David+de+Boer#diff-c3JjL01lc3NhZ2UucGhw) | `85.58% <0.00%> (-2.42%)` | :arrow_down: | | [src/MessageIterator.php](https://codecov.io/gh/ddeboer/imap/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=David+de+Boer#diff-c3JjL01lc3NhZ2VJdGVyYXRvci5waHA=) | `100.00% <0.00%> (ø)` | | | [src/Message/Attachment.php](https://codecov.io/gh/ddeboer/imap/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=David+de+Boer#diff-c3JjL01lc3NhZ2UvQXR0YWNobWVudC5waHA=) | `100.00% <0.00%> (ø)` | | | [src/Message/AbstractPart.php](https://codecov.io/gh/ddeboer/imap/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=David+de+Boer#diff-c3JjL01lc3NhZ2UvQWJzdHJhY3RQYXJ0LnBocA==) | `95.91% <0.00%> (+0.11%)` | :arrow_up: | | ... and [3 more](https://codecov.io/gh/ddeboer/imap/pull/553?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=David+de+Boer) | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=David+de+Boer). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=David+de+Boer)

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