Require ext-mongodb ^1.3.0

This also updates Travis CI to pull 1.3.0RC1 until a stable 1.3.0 is available.

.travis.yml

@@ -5,10 +5,6 @@ sudo: false
 services:
   - mongodb
 
-env:
-  global:
-    - DRIVER_VERSION=stable SERVER_VERSION=3.4
-
 addons:
   apt:
     packages: &common_packages
@@ -18,7 +14,7 @@ matrix:
   fast_finish: true
   include:
     - php: 5.5
-      env: &common_env DRIVER_VERSION=stable SERVER_VERSION=3.4
+      env: &common_env DRIVER_VERSION=1.3.0RC1 SERVER_VERSION=3.4
       addons: &common_addons
         apt: 
           sources: [ mongodb-3.4-precise ]
@@ -36,25 +32,25 @@ matrix:
       env: *common_env
       addons: *common_addons
     - php: 7.0
-      env: DRIVER_VERSION=1.2.0 SERVER_VERSION=2.4
+      env: DRIVER_VERSION=1.3.0RC1 SERVER_VERSION=2.4
       addons:
         apt:
           sources: [ mongodb-upstart ]
           packages: [ mongodb-10gen, *common_packages ]
     - php: 7.0
-      env: DRIVER_VERSION=1.2.0 SERVER_VERSION=2.6
+      env: DRIVER_VERSION=1.3.0RC1 SERVER_VERSION=2.6
       addons:
         apt:
           sources: [ mongodb-upstart ]
           packages: [ mongodb-org, *common_packages ]
     - php: 7.0
-      env: DRIVER_VERSION=1.2.0 SERVER_VERSION=3.0
+      env: DRIVER_VERSION=1.3.0RC1 SERVER_VERSION=3.0
       addons:
         apt:
           sources: [ mongodb-3.0-precise ]
           packages: [ mongodb-org, *common_packages ]
     - php: 7.0
-      env: DRIVER_VERSION=1.2.0 SERVER_VERSION=3.2
+      env: DRIVER_VERSION=1.3.0RC1 SERVER_VERSION=3.2
       addons:
         apt:
           sources: [ mongodb-3.2-precise ]

composer.json

@@ -11,7 +11,7 @@
     ],
     "require": {
         "php": ">=5.4",
-        "ext-mongodb": "^1.2.0"
+        "ext-mongodb": "^1.3.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8"