Issue #3400018 by mstrelan, xjm: Add declare(strict_types=1) to all Functional JavaScript tests

...rupal/FunctionalJavascriptTests/Tests/JSWebAssertTest.php

.../FunctionalJavascriptTests/Theme/ClaroBlockFilterTest.php

...unctionalJavascriptTests/Theme/ClaroEntityDisplayTest.php

...tionalJavascriptTests/Theme/ClaroMenuUiJavascriptTest.php

...FunctionalJavascriptTests/Theme/ClaroModalDisplayTest.php

...lJavascriptTests/Theme/ClaroPasswordConfirmWidgetTest.php

...al/FunctionalJavascriptTests/Theme/ClaroTableDragTest.php

...nalJavascriptTests/Theme/ClaroViewsBulkOperationsTest.php

...upal/FunctionalJavascriptTests/Theme/ClaroViewsUiTest.php

...l/FunctionalJavascriptTests/Theme/OliveroMessagesTest.php

...Drupal/FunctionalJavascriptTests/WebDriverCurlService.php

...ts/Drupal/FunctionalJavascriptTests/WebDriverTestBase.php

...s/Drupal/FunctionalJavascriptTests/WebDriverWebAssert.php