Merge pull request #81 from gdejong/patch-2

Run tests on PHP 7.4

Author: WyriHaximus

.travis.yml

@@ -9,6 +9,7 @@ php:
   - 7.1
   - 7.2
   - 7.3
+  - 7.4  
 # - hhvm # requires legacy phpunit & ignore errors, see below
 
 # lock distro so new future defaults will not break the build