Require warden-core and warden-validator-symfony at ^1.2.1

So we can use the new `mode=strict` annotation on email fields to replace the deprecated `checkMX=true` which was removed in symfony validator v5

composer.json

@@ -25,9 +25,9 @@
     "ingenerator/kohana-extras": "^3.1",
     "ingenerator/kohana-view": "^4.4",
     "ingenerator/tokenista": "^1.4",
-    "ingenerator/warden-core": "^1.2",
+    "ingenerator/warden-core": "^1.2.1",
     "ingenerator/warden-persistence-doctrine": "^1.2",
-    "ingenerator/warden-validator-symfony": "^1.2",
+    "ingenerator/warden-validator-symfony": "^1.2.1",
     "symfony/mailer": "^6.3 || ^7.0"
   },
   "require-dev": {
@@ -37,7 +37,7 @@
   },
   "conflict": {
     "egulias/email-validator": "<3.2.1",
-    "symfony/validator": "<6.0"
+    "symfony/validator": ">5.4.35"
   },
   "repositories": [
     {