Update .travis.yml

bupy7 · web-flow · commit 62b1a722491d · 2020-02-07T00:15:02.000+05:00
diff --git a/.travis.yml b/.travis.yml
@@ -6,6 +6,7 @@ php:
   - '7.1'
   - '7.2'
   - '7.3'
+  - '7.4'
   
 before_script:
   - composer install --no-interaction
