Upgrade dependencies / PHP >= 5.6

Author: tvdijen

.travis.yml

@@ -3,7 +3,6 @@ sudo: required
 language: php
 
 php:
-  - 5.5
   - 5.6
   - 7.0
   - 7.1

bin/check-syntax.sh

@@ -4,7 +4,7 @@ PHP='/usr/bin/env php'
 RETURN=0
 
 # check PHP files
-for FILE in `find lib libextinc templates www -name "*.php"`; do
+for FILE in `find lib libextinc templates tests www -name "*.php"`; do
     $PHP -l $FILE > /dev/null 2>&1
     if [ $? -ne 0 ]; then
         echo "Syntax check failed for ${FILE}"

composer.json

@@ -27,13 +27,13 @@
         }
     },
     "require": {
-        "php": ">=5.5",
+        "php": ">=5.6",
         "simplesamlphp/composer-module-installer": "~1.1",
         "webmozart/assert": "~1.4"
     },
     "require-dev": {
         "simplesamlphp/simplesamlphp": "^1.17",
-        "phpunit/phpunit": "~4.8.36"
+        "phpunit/phpunit": "~5.7"
     },
     "support": {
         "issues": "https://github.com/tvdijen/simplesamlphp-module-yubikey/issues",