Fixed failing tests due to minimum PHP version being PHP 5.6

PHLAK · PHLAK · commit 76932b6571d5 · 2017-09-07T16:53:52.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,8 +2,6 @@ sudo: false
 
 language: php
 php:
-    - 5.4
-    - 5.5
     - 5.6
     - 7.0
     - 7.1
diff --git a/composer.json b/composer.json
@@ -13,7 +13,7 @@
         "issues": "https://github.com/PHLAK/SemVer/issues"
     },
     "require": {
-        "php": ">=5.4"
+        "php": ">=5.6"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.8",

-Original file line number
+Diff line change
 language: php
 php:
 -    - 5.4
 -    - 5.5
     - 5.6
     - 7.0
     - 7.1