Added return types for 8-1 compatibility Iterator implementations #5
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Context
Need to bring package up to PHP8.1 compatibility
What has been done
Modified various iterator implementations to match 8.1 iterator interface https://www.php.net/manual/en/class.iterator.php
How to test
Appears to work for 8.0 and 8.1. If you wish to test in 8.1 update the dockerfile to:
FROM php:8.1-cli-alpineAnd run tests as usual.
Note: No extra tests have been added