Only comply with psr/log v1 for php compatibility

Author: tdgroot

composer.json

@@ -17,6 +17,6 @@
     },
     "require": {
         "deployer/deployer": "^6.8",
-        "psr/log": "^1.0|^2.0|^3.0"
+        "psr/log": "^1.0"
     }
 }