Standardize Accessibility of Quote Blocks Across Browsers (#828)

* added escaping function

* change figure role to presentation

* simplify the block to be interpreted same across the browsers

blocks/init/src/Blocks/components/quote/quote.php

@@ -33,7 +33,7 @@
 $quoteAuthorUse = Components::checkAttr('quoteAuthorUse', $attributes, $manifest);
 ?>
 
-<figure class="<?php echo esc_attr($quoteClass); ?>">
+<figure class="<?php echo esc_attr($quoteClass); ?>" role="presentation">
 	<?php
 	echo Components::render('icon', Components::props('icon', $attributes, [
 		'blockClass' => $componentClass
@@ -51,7 +51,7 @@
 	<?php if ($quoteAuthorUse) { ?>
 		<div class="<?php echo esc_attr($quoteSeparatorClass); ?>"></div>
 
-		<figcaption class="<?php echo esc_attr($quoteCaptionClass); ?>">
+		<figcaption class="<?php echo esc_attr($quoteCaptionClass); ?>" role="presentation">
 			<?php
 			echo Components::render('paragraph', Components::props('author', $attributes, [
 				'blockClass' => $componentClass