Merge branch '1.0.x' into master

* 1.0.x:
  Test against PHP 7.1

.travis.yml

@@ -4,14 +4,17 @@ language: php
 php:
   - 5.6
   - 7.0
+  - 7.1
 
 env:
-  - DRIVER_VERSION=1.2.0alpha1
+  - DRIVER_VERSION=stable
 
 matrix:
   include:
     - php: 5.6
-      env: DRIVER_VERSION=1.2.0alpha1 LEGACY_DRIVER_VERSION=stable
+      env: DRIVER_VERSION=stable LEGACY_DRIVER_VERSION=stable
+    - php: 5.5
+      env: DRIVER_VERSION=1.1.0 COMPOSER_FLAGS="--prefer-dist --prefer-lowest"
 
 addons:
   apt:
@@ -22,7 +25,7 @@ addons:
 
 before_script:
   - pecl install -f mongodb-${DRIVER_VERSION}
-  - composer install
+  - composer update ${COMPOSER_FLAGS}
   - if [ "x$LEGACY_DRIVER_VERSION" != "x" ]; then yes '' | pecl -q install -f mongo-${LEGACY_DRIVER_VERSION}; fi
 
 script: