fix: Switch Travis CI environment to Trusty for PHP 5.3 (no longer available)

Author: golovetska

.travis.yml

@@ -1,8 +1,7 @@
 language: php
+dist: trusty
 
 php:
-  - 5.3
-    dist: precise
   - 5.4
   - 5.5
   - 5.6
@@ -16,6 +15,9 @@ script:
   - vendor/phpspec/phpspec/bin/phpspec run -f dot
 
 matrix:
+  include:
+    - php: 5.3
+      dist: precise
   allow_failures:
     - php: hhvm
   fast_finish: true

composer.json

@@ -17,7 +17,6 @@
         "phpspec/phpspec": "^2.5"
     },
     "config": {
-        "platform": {"php": "5.3.9"},
         "bin-dir": "bin"
     },
     "bin": [