Indicate compatibility with psr/log 2 and 3

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

Author: derrabus

composer.json

@@ -18,7 +18,7 @@
     "require": {
         "php": ">=7.1.3",
         "egulias/email-validator": "^2.1.10|^3",
-        "psr/log": "~1.0",
+        "psr/log": "^1|^2|^3",
         "symfony/event-dispatcher": "^4.3",
         "symfony/mime": "^4.4.21|^5.2.6",
         "symfony/service-contracts": "^1.1|^2"