:octocat: ext-gd missing on 7.4

.travis.yml

@@ -9,9 +9,12 @@ matrix:
   include:
     - php: 7.2
     - php: 7.3
+    - php: 7.4snapshot
     - php: 7.4
 #    - php: nightly
-#  allow_failures:
+  allow_failures:
+    - php: 7.4snapshot
+    - php: 7.4 # ext-gd missing https://travis-ci.community/t/add-php-7-4-branch-to-test-against/2179/16
 #    - php: nightly
 
 before_install: