Merge pull request #4 from Codeception/php7.4

PHP 7.4: Fix Trying to access array offset on value of type bool warning

.travis.yml

@@ -8,6 +8,7 @@ php:
   - 7.1
   - 7.2
   - 7.3
+  - 7.4snapshot
 # faster builds on new travis setup not using sudo
 sudo: false
 

src/Codeception/Lib/InnerBrowser.php

@@ -865,11 +865,13 @@ protected function setCheckboxBoolValues(Crawler $form, array $params)
             if ($values === true) {
                 $params[$fieldName] = $box->hasAttribute('value') ? $box->getAttribute('value') : 'on';
                 $chFoundByName[$fieldName] = $pos + 1;
-            } elseif ($values[$pos] === true) {
-                $params[$fieldName][$pos] = $box->hasAttribute('value') ? $box->getAttribute('value') : 'on';
-                $chFoundByName[$fieldName] = $pos + 1;
             } elseif (is_array($values)) {
-                array_splice($params[$fieldName], $pos, 1);
+                if ($values[$pos] === true) {
+                    $params[$fieldName][$pos] = $box->hasAttribute('value') ? $box->getAttribute('value') : 'on';
+                    $chFoundByName[$fieldName] = $pos + 1;
+                } else {
+                    array_splice($params[$fieldName], $pos, 1);
+                }
             } else {
                 unset($params[$fieldName]);
             }