Merge pull request #20 from cs278/update-conflict-rule

Amend conflict list to allow fixed versions of symfony/yaml

composer.json

@@ -24,7 +24,7 @@
         "symfony/process": "^4.4 || ^5"
     },
     "conflict": {
-        "symfony/yaml": "~4.4.27 || ~5.2.12 || ~5.3.4"
+        "symfony/yaml": "=4.4.27 || =4.4.28 || =5.2.12 || =5.2.13 || =5.3.4 || =5.3.5"
     },
     "autoload": {
         "psr-4": {