Updating version constraint

Author: dragoonis

composer.json

@@ -15,7 +15,7 @@
         "issues": "https://github.com/ppi/ppi-datasource-module/issues"
     },
     "require": {
-        "ppi/datasource": "~1.0"
+        "ppi/datasource": "^1.0"
     },
     "require-dev":{
         "phpunit/phpunit": "3.7.*"