Merge pull request #466 from acelaya-forks/feature/fix-7.4-build

Updated build from PHP 7.4 to 7.4snapshot

.travis.yml

@@ -7,11 +7,11 @@ branches:
 php:
   - '7.2'
   - '7.3'
-  - '7.4'
+  - '7.4snapshot'
 
 matrix:
   allow_failures:
-    - php: '7.4'
+    - php: '7.4snapshot'
 
 services:
   - mysql