tw_ee_add_pagination_to_ee_events.php

<?php //PLease do not include this opening PHP tag if you already have one.

function tw_ee_add_pagination_to_ee_events( $wp_query ) {
	if( is_post_type_archive('espresso_events') ) {
		// Previous/next page navigation.
		the_posts_pagination( array(
		'prev_text'          => '<i class="fa fa-angle-double-left"></i>',
		'next_text'          => '<i class="fa fa-angle-double-right"></i>',
		) );
	}
}
add_action('loop_end', 'tw_ee_add_pagination_to_ee_events');