Merge pull request #27 from creative-commoners/pulls/4.5/php71

Update minimum PHP version to 7.1 in Travis

.travis.yml

@@ -6,13 +6,13 @@ env:
 
 matrix:
   include:
-    - php: 5.6
-      env: DB=MYSQL
-    - php: 7.0
-      env: DB=PGSQL
     - php: 7.1
       env: DB=MYSQL
     - php: 7.2
+      env: DB=PGSQL
+    - php: 7.3
+      env: DB=MYSQL
+    - php: 7.3
       env: DB=MYSQL
 
 before_script: