Test 1.3.0 Mongo driver

Released an hour ago
https://pecl.php.net/package-info.php?package=mongodb&version=1.3.0
https://github.com/mongodb/mongo-php-driver/releases/tag/1.3.0

.travis.yml

@@ -36,7 +36,7 @@ matrix:
             - "mongodb-upstart"
           packages: ['mongodb-org-server']
     - php: 7.1
-      env: DRIVER_VERSION="1.3.0beta1"
+      env: DRIVER_VERSION="1.3.0"
 
 before_install:
   - pecl install -f mongodb-${DRIVER_VERSION}