minor #32 drop PHP < 5.6 support (xabbuh)

This PR was merged into the 0.6.x-dev branch.

Discussion
----------

drop PHP < 5.6 support

Commits
-------

86bc02a drop PHP < 5.6 support

Author: xabbuh

.travis.yml

@@ -11,20 +11,15 @@ env:
     - deps=""
     - COMPOSER_OPTIONS="--prefer-stable"
 
-php:
-  - 5.5
-  - 5.6
-
 matrix:
   fast_finish: true
   include:
-    - php: 5.4
-      env: $COMPOSER_OPTIONS="--prefer-lowest --prefer-stable --ignore-platform-reqs"
     - php: 5.6
-      env: PACKAGES="php-http/discovery:^1.0 php-http/guzzle6-adapter:^1.0 php-http/message:^1.0 xabbuh/oauth1-authentication:~1.0"
+      env: $COMPOSER_OPTIONS="--prefer-lowest --prefer-stable --ignore-platform-reqs"
     - php: 7.0
-      env: xdebug="yes"
+      env: PACKAGES="php-http/discovery:^1.0 php-http/guzzle6-adapter:^1.0 php-http/message:^1.0 xabbuh/oauth1-authentication:~1.0"
     - php: 7.1
+      env: xdebug="yes"
     - php: 7.2
 
 before_install:

CHANGELOG.md

@@ -4,7 +4,7 @@ CHANGELOG
 0.6.0
 -----
 
-* dropped the support for HHVM
+* dropped the support for HHVM and for PHP < 5.6
 
 * updated the `X-Experience-API-Version` header to default to the latest patch
   version (`1.0.3`)

composer.json

@@ -12,7 +12,7 @@
         }
     ],
     "require": {
-        "php": ">=5.4.0",
+        "php": "^5.6 || ^7.0",
         "php-http/client-common": "^1.0",
         "php-http/client-implementation": "^1.0",
         "php-http/httplug": "^1.0",