travis: test against PHP 8

kornrunner · kornrunner · commit 4e466130ada1 · 2020-12-22T11:54:04.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,6 +7,8 @@ matrix:
     - env: COMPOSER_FLAGS="--prefer-lowest"
       php: 7.1
     - php: 7.2
+    - php: 8.0
+      dist: bionic
 
 before_install:
   - composer self-update
