Bug fix - failing CI test

[marko220991]

After taking a closer look at failing CI test, some changes were made and now all tests are working fine. Some builtin PHPUnit functions, like assertContains and assertInternalType, were depracated, and that is why we had warnings and failures.

After we updated those php files with new functions, all seems to work fine now.

• Instead of assertContains we used assertStringContainsStringIgnoringCase();
• Instead of assertInternalType we used assertIsArray();

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 72.72%. Comparing base (226144c) to head (df49ac5).

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #104 +/- ## ========================================= Coverage 72.72% 72.72% Complexity 24 24 ========================================= Files 5 5 Lines 88 88 ========================================= Hits 64 64 Misses 24 24 ```

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