MDL-81266 composer: PHPUnit 9.6, Behat to 3.14 and other deps

Bump to PHPUnit 9.6 towards warning in advance about
stuff that will be removed for PHPUnit 10, namely:
 - expect[Deprecation|Error|Notice|Warning] methods.
 - assert[Object|Class][Not]Has[Static]Attribute methods.
 - withConsecutive()
 - TestCase::getMockClass()
 - "Test" suffix for abstract test case classes.

The behat bump is only applied to 402_STABLE and up, all them
requiring PHP 8.0 as a minimum. And generated following the
instructions in the dev docs.

composer.json

@@ -5,15 +5,15 @@
     "type": "project",
     "homepage": "https://moodle.org",
     "require-dev": {
-        "phpunit/phpunit": "9.5.*",
+        "phpunit/phpunit": "^9.6.18",
         "mikey179/vfsstream": "1.6.*",
-        "behat/mink": "^1.10.0",
-        "friends-of-behat/mink-extension": "^2.7.4",
-        "behat/mink-browserkit-driver": "^2.1.0",
-        "symfony/process": "^4.4 || ^5.0 || ^6.0",
-        "symfony/http-client": "^4.4 || ^5.0 || ^6.0",
-        "symfony/mime": "^4.4 || ^5.0 || ^6.0",
-        "behat/behat": "3.13.*",
+        "behat/mink": "^1.11.0",
+        "friends-of-behat/mink-extension": "^2.7.5",
+        "behat/mink-browserkit-driver": "^2.2.0",
+        "symfony/process": "^4.4 || ^5.0 || ^6.0 || ^7.0",
+        "symfony/http-client": "^4.4 || ^5.0 || ^6.0 || ^7.0",
+        "symfony/mime": "^4.4 || ^5.0 || ^6.0 || ^7.0",
+        "behat/behat": "3.14.*",
         "oleg-andreyev/mink-phpwebdriver": "1.3.*",
         "filp/whoops": "^2.15"
     },