Update .travis.yml

Author: snapshotpl

.travis.yml

@@ -24,14 +24,14 @@ matrix:
       env: ES_VERSION="7.4.2"
     - php: 7.3
       env: ES_VERSION="8.0.0-SNAPSHOT"
-    - php: 7.4snapshot
+    - php: 7.4
       env: ES_VERSION="7.4.2"
-    - php: 7.4snapshot
+    - php: 7.4
       env: ES_VERSION="8.0.0-SNAPSHOT"
   allow_failures:
     - php: 7.3
       env: ES_VERSION="8.0.0-SNAPSHOT"
-    - php: 7.4snapshot
+    - php: 7.4
       env: ES_VERSION="8.0.0-SNAPSHOT"
 
 env: