Update `OptimizeHeroImages::generateImg()` test cases · ampproject/amp-toolbox-php@16b9f66

PHPDoc tag @var with type AmpProject\Cli\Command is not subtype of native type AmpProject\Cli\Command\Optimize|AmpProject\Cli\Command\Validate.

Call to function is_array() with array will always evaluate to true.

Call to function is_int() with int will always evaluate to true.

Call to function is_string() with string will always evaluate to true.

Instanceof between AmpProject\Dom\Document\Filter and AmpProject\Dom\Document\Filter will always evaluate to true.

Strict comparison using !== between string and false will always evaluate to true.

Call to an undefined method DOMNode::setAttribute().

Instanceof between DOMAttr and DOMAttr will always evaluate to true.

Call to function is_array() with array will always evaluate to true.

Instanceof between DOMNode and DOMNode will always evaluate to true.

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, actions/cache@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

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