Allow psr/log v3.0 (#310)

Author: driesvints

composer.json

@@ -21,7 +21,7 @@
     "psr/container": "^1.0 | ^2.0",
     "psr/http-client-implementation": "^1.0",
     "vonage/nexmo-bridge": "^0.1.0",
-    "psr/log": "^1.1|^2.0"
+    "psr/log": "^1.1|^2.0|^3.0"
   },
   "require-dev": {
     "php": "~7.4 || ~8.0 || ~8.1",