Indicate compatibility with psr/log 2 and 3

Signed-off-by: Alexander M. Turek <me@derrabus.de>

Author: derrabus

composer.json

@@ -25,7 +25,7 @@
     "require-dev": {
         "symfony/routing": "^3.4|^4.0|^5.0",
         "symfony/security-csrf": "^3.4.11|^4.0.11|^5.0",
-        "psr/log": "~1.0"
+        "psr/log": "^1|^2|^3"
     },
     "conflict": {
         "symfony/event-dispatcher": ">=5",