Indicate compatibility with psr/log 2 and 3

Signed-off-by: Alexander M. Turek <[email protected]>

Author: derrabus

composer.json

@@ -27,7 +27,7 @@
         "symfony/http-foundation": "^3.4|^4.0|^5.0",
         "symfony/service-contracts": "^1.1|^2",
         "symfony/stopwatch": "^3.4|^4.0|^5.0",
-        "psr/log": "~1.0"
+        "psr/log": "^1|^2|^3"
     },
     "conflict": {
         "symfony/dependency-injection": "<3.4"