Reduce test matrix

Test with dbase only on most prominent PHP versions.

Signed-off-by: Michal Čihař <[email protected]>

Author: nijel

.travis.yml

@@ -13,13 +13,16 @@ matrix:
   fast_finish: true
   allow_failures:
     - php: "nightly"
-  exclude:
-    - php: "hhvm"
+  include:
+    - php: "5.6"
+      env: DBASE=yes
+    - php: "7.0"
+      env: DBASE=yes
+    - php: "7.1"
       env: DBASE=yes
 
 env:
   matrix:
-    - DBASE=yes
     - DBASE=no
 
 install: