Merge pull request #28 from CESNET/upgrade_stats_dependency

fix(deps): bump proxystats dependedcy to v8.0.0 and higher

Author: Dominik František Bučík

composer.json

@@ -22,7 +22,7 @@
         "simplesamlphp/composer-module-installer": "~1.0",
         "simplesamlphp/simplesamlphp": "~v1.19.0",
         "cesnet/simplesamlphp-module-perun": "^v7.2.0",
-        "cesnet/simplesamlphp-module-proxystatistics": "^v7.0.2",
+        "cesnet/simplesamlphp-module-proxystatistics": "^v8.0.0",
         "ext-json": "*",
         "ext-curl": "*",
         "ext-pdo": "*"