Update dependency thecodingmachine/safe to v2

Author: renovate[bot]

composer.json

@@ -18,7 +18,7 @@
         "psr/http-message": "^1.0.1",
         "psr/log": "^1.1",
         "teapot/status-code": "^2.0",
-        "thecodingmachine/safe": "^0.1.16"
+        "thecodingmachine/safe": "^2.0.0"
     },
     "require-dev": {
         "cdn77/coding-standard": "^7.0",