Remove support for PHP 5.5

.travis.yml

@@ -2,7 +2,6 @@ sudo: false
 language: php
 
 php:
-  - 5.5
   - 5.6
   - 7.0
 

CHANGELOG-1.1.md

@@ -10,6 +10,8 @@ All issues and pull requests under this release may be found under the
 [1.1.0](https://github.com/alcaeus/mongo-php-adapter/issues?q=milestone%3A1.1.0)
 milestone.
 
+ * [#128](https://github.com/alcaeus/mongo-php-adapter/pull/128) removes support
+ for PHP 5.5.
  * [#127](https://github.com/alcaeus/mongo-php-adapter/pull/127) reads the `code`
  and `scope` properties of `MongoDB\BSON\Javascript` objects when converting them
  to `MongoCode` objects.

composer.json

@@ -9,7 +9,7 @@
         { "name": "Olivier Lechevalier", "email": "olivier.lechevalier@gmail.com" }
     ],
     "require": {
-        "php": "^5.5 || ^7.0",
+        "php": "^5.6 || ^7.0",
         "ext-hash": "*",
         "ext-mongodb": "^1.2.0",
         "mongodb/mongodb": "^1.0.1"