Testing PHP 7.2 and 7.3 (#737)

* Testing PHP 7.2 and 7.3

* Underping...

.travis.yml

@@ -1,17 +1,21 @@
 sudo: true
 language: php
 php:
-  - 7.1
   - 7.2
-services:
+  - 7.3
-  - mysql
 
 matrix:
     fast_finish: true
+    allow_failures:
+      - php: 7.3
+      
+services:
+  - mysql
 
 branches:
   only:
     - /^8.x/
+    - /master/
 
 before_install:
   - export SCRIPT_DIR=$HOME/CLAW/.scripts