Bump PHP versions on travis

Pierstoval · Pierstoval · commit 92688ffecc6c · 2020-12-04T20:39:21.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -19,6 +19,8 @@ addons:
 php:
     - '7.2'
     - '7.3'
+    - '7.4'
+    - '8.0'
 
 before_install: |
     composer self-update
