Fix phpstan errors, and some refactoring #612
Open
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Pull Request for Issue #606 .
Summary of Changes
I've fixed all of phpstan errors, refactored to match new Joomla standards and replaced the deprecated methods calls

BEFORE the PR:
AFTER the PR:

Testing Instructions
Run phpstan using this command
./vendor/bin/phpstan(you can also check from drone ci)Expected result
No errors in phpstan, no deperecated methods used
Actual result
some errors in phpstan, and old deperecated methods used
Documentation Changes Required