bug #120 Make sure we don't update title twice (Nyholm)

This PR was squashed before being merged into the master branch.

Discussion
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Make sure we don't update title twice

I want to avoid this:

<img width="928" alt="Screenshot 2020-11-12 at 22 38 44" src="https://user-images.githubusercontent.com/1275206/99003123-db745880-253d-11eb-8917-b9fe115dc860.png">

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It happens when a user adds two labels at the same time.

FYI @jderusse

Commits
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ca2f05b composer fixes
ad5b9d2 Make sure we dont update title twice

Author: weaverryan

composer.json

@@ -1,5 +1,6 @@
 {
     "name": "carsonbot/carsonbot",
+    "description": "The Carson Issue Butler",
     "type": "project",
     "license": "MIT",
     "require": {
@@ -16,8 +17,9 @@
         "symfony/console": "^5.1",
         "symfony/dotenv": "^5.1",
         "symfony/flex": "^1.8",
-        "symfony/framework-bundle": "^5.1",
-        "symfony/http-client": "^v5.2.0-BETA3",
+        "symfony/framework-bundle": "^5.2@rc",
+        "symfony/http-client": "^5.2@rc",
+        "symfony/lock": "^5.2@rc",
         "symfony/monolog-bundle": "~3.5",
         "symfony/security-core": "5.1.*",
         "symfony/twig-pack": "^1.0",
@@ -68,5 +70,7 @@
             "assets:install --symlink --relative %PUBLIC_DIR%": "symfony-cmd",
             "assets:install %PUBLIC_DIR%": "symfony-cmd"
         }
-    }
+    },
+    "minimum-stability": "RC",
+    "prefer-stable": true
 }