Raise PHP functional level

Author: tvdijen

composer.json

@@ -20,12 +20,12 @@
         }
     },
     "require": {
-        "php": ">=5.6",
+        "php": ">=7.0",
         "simplesamlphp/composer-module-installer": "~1.1"
     },
     "require-dev": {
-        "simplesamlphp/simplesamlphp": ">=1.17",
-        "simplesamlphp/simplesamlphp-test-framework": "~0.0.6"
+        "simplesamlphp/simplesamlphp": ">=1.18",
+        "simplesamlphp/simplesamlphp-test-framework": "~0.1.0"
     },
     "autoload": {
         "psr-4": {