Update composer.json

Author: Raruto

composer.json

@@ -19,7 +19,7 @@
         "wpackagist-plugin/dewdrop-custom-scrollbar": "1.4",
         "wpackagist-plugin/dont-muck-my-markup": "1.7",
         "wpackagist-plugin/easy-fancybox": "1.6.3",
-        "wpackagist-plugin/ewww-image-optimizer": "4.1.1",
+        "wpackagist-plugin/ewww-image-optimizer": "4.2.1",
         "afragen/github-updater": "7.5.0",
         "wpackagist-plugin/html-editor-syntax-highlighter": "2.2.3",
         "wpackagist-plugin/media-cleaner": "4.5.8",