Bootstrap Paging and Wordpress

paging.php

<?php
//Use this function to create pagingation links that are styleable with Twitter Bootstrap

function paging() {
global $wp_query;

$total_pages = $wp_query->max_num_pages;

if ($total_pages > 1){
	$current_page = max(1, get_query_var('paged'));
	$count = 0;
	$previous_page = $current_page - 1;
	$next_page = $current_page + 1;
	echo '<div class="pagination">';
	echo '<ul>';
	if($total_pages > 3) { 
		if($current_page > 1) echo '<li class="last"><a href="' . get_bloginfo('url') . '/posts/page/1/?"><<</a></li>' ;
		if($current_page > 1) echo '<li class="previous"><a href="' . get_bloginfo('url') . '/posts/page/' . $previous_page . '/?"><</i></a></li>' ;
	}
	while($count < $total_pages) {
		 $count = $count + 1;  
		 
		 if($count == $current_page) echo '<li class="active"><a href="' . get_bloginfo('url') . '/posts/page/' . $count . '/?">' . $count . '</a></li>' ;
		 else echo '<li class="inactive"><a href="' . get_bloginfo('url') . '/posts/page/' . $count . '/?">' . $count . '</a></li>' ;

	}
		if($total_pages > 3) {
			if($current_page < $total_pages) echo '<li class="next"><a href="' . get_bloginfo('url') . '/posts/page/' . $next_page . '/?pp=1">></i></a></li>' ;
			if($current_page < $total_pages) echo '<li class="last"><a href="' . get_bloginfo('url') . '/posts/page/' . $total_pages . '/?pp=1">>></a></li>' ;
		}
	?>
	
		</ul>
		</div>
	<?php
  }

Do you know how this could be modified for Bootstrap 4?
https://v4-alpha.getbootstrap.com/components/pagination/