Merge pull request #4 from roalvesrj/master

Corrigindo compatibilidade com PHP 7.4.*

Author: cagartner

src/PhpQuery.php

@@ -117,7 +117,7 @@ abstract class PhpQuery {
   public static $enableCssShorthand = FALSE;
 
   public static function use_function($ns = '\\', $func = 'pq') {
-    if ($ns{0} !== '\\') {
+    if ($ns[0] !== '\\') {
       $ns = '\\' . $ns;
     }
     if (!function_exists($ns . '\\' . $func)) {

src/PhpQueryObject.php

@@ -1094,7 +1094,7 @@ protected function pseudoClasses($class) {
         if (!$param)
           break;
         // nth-child(n+b) to nth-child(1n+b)
-        if ($param{0} == 'n')
+        if ($param[0] == 'n')
           $param = '1' . $param;
         // :nth-child(index/even/odd/equation)
         if ($param == 'even' || $param == 'odd')