Also test on PHP 7.3

Author: stayallive

.travis.yml

@@ -11,6 +11,7 @@ php:
   - 7.0
   - 7.1
   - 7.2
+  - 7.3
 
 env:
   matrix:
@@ -37,6 +38,8 @@ matrix:
       env: LARAVEL=5.7.* TESTBENCH=3.7.* PHPUNIT=7.3.*
     - php: 7.2
       env: LARAVEL=5.0.* TESTBENCH=3.0.* PHPUNIT=4.8.*
+    - php: 7.3
+      env: LARAVEL=5.0.* TESTBENCH=3.0.* PHPUNIT=4.8.*
 
 before_install:
   - composer self-update --stable --no-interaction