bug fix for php 7.1. travis removed

Author: adityapatadia

lib/ImageResize.php

@@ -111,8 +111,8 @@ public function __construct($filename)
 
         $finfo = finfo_open(FILEINFO_MIME_TYPE);
         $checkWebp = false;
-        if (strstr(finfo_file($finfo, $filename), 'image') === false) {
-            if (version_compare(PHP_VERSION, '7.1.0', '<') && strstr(file_get_contents($filename), 'WEBPVP8') !== false) {
+        if (strstr(finfo_file($finfo, $filename), 'image') === false || version_compare(PHP_VERSION, '7.1.0', '<')) {
+            if (strstr(file_get_contents($filename), 'WEBPVP8') !== false) {
                 $checkWebp = true;
                 $this->source_type = IMAGETYPE_WEBP;
             } else {