Add missing symfony/deprecation-contracts requirement

jderusse · jderusse · commit bf1e59137308 · 2020-12-14T15:33:09.000+01:00
diff --git a/composer.json b/composer.json
@@ -17,6 +17,7 @@
     ],
     "require": {
         "php": ">=7.2.5",
+        "symfony/deprecation-contracts": "^2.1",
         "symfony/messenger": "^5.1"
     },
     "require-dev": {
