Allow thecodingmachine/safe 3.x

Author: Marick van Tuil

composer.json

@@ -12,7 +12,7 @@
         "ext-json": "*",
         "phpseclib/phpseclib": "^3.0",
         "google/cloud-tasks": "^1.15|^2.0",
-        "thecodingmachine/safe": "^1.0|^2.0"
+        "thecodingmachine/safe": "^1.0|^2.0|^3.0"
     },
     "require-dev": {
         "orchestra/testbench": "^8.0",