Updating travis - removing precise, adding 3.7

.travis.yml

@@ -4,26 +4,18 @@ sudo: false
 
 language: php
 
-dist: precise
-
-php:
-  - 5.3
-  - 5.4
-  - 5.5
-
-env:
-  - DB=MYSQL CORE_RELEASE=3.5
-
 matrix:
   include:
     - php: 5.6
-      env: DB=MYSQL CORE_RELEASE=3
+      env: DB=MYSQL CORE_RELEASE=3.5
     - php: 5.6
-      env: DB=MYSQL CORE_RELEASE=3.1
-    - php: 5.6
-      env: DB=PGSQL CORE_RELEASE=3.2
-    - php: 7.1
       env: DB=MYSQL CORE_RELEASE=3.6
+    - php: 5.6
+      env: DB=MYSQL CORE_RELEASE=3.7
+    - php: 7.0
+      env: DB=PGSQL CORE_RELEASE=3
+    - php: 7.1
+      env: DB=PGSQL CORE_RELEASE=3
 
 before_script:
   - composer self-update || true