Add php 7.4 and 8.0 testing

Stichoza · Stichoza · commit 6989fe96f5ae · 2021-01-13T13:53:29.000+04:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,6 +3,8 @@ php:
   - 7.1
   - 7.2
   - 7.3
+  - 7.4
+  - 8.0
 
 before_script:
   - composer self-update
