Updated Travis config

Author: JoshyPHP

.travis.yml

@@ -6,7 +6,7 @@ matrix:
     - php: 7.3
       env: COVERAGE=1
     - php: 7.1
-    - php: 7.4snapshot
+    - php: 7.4
 before_script:
   - sh -c "if [ '$COVERAGE' ]; then wget https://scrutinizer-ci.com/ocular.phar -O /tmp/ocular.phar; fi"
   - composer install