MDL-80313 composer: Bump composer stuff to use php81 as minimum

It seems that in MDL-78496 we missed to regenerate the
composer stuff using the new PHP 8.1 requirement.

This commit addresses exactly that, following the instructions:

https://moodledev.io/general/development/tools/composer#how-to-prepare-and-submit-composer-changes

Note it comes with a few updated components:
- friends-of-behat/mink-extension 2.7.4
- oleg-andreyev/mink-phpwebdriver 1.3.1

And a bunch of second (and deeper) level dependencies updated too.

composer.json

@@ -8,13 +8,13 @@
         "phpunit/phpunit": "9.5.*",
         "mikey179/vfsstream": "1.6.*",
         "behat/mink": "^1.10.0",
-        "friends-of-behat/mink-extension": "^2.7.2",
+        "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.*",
-        "oleg-andreyev/mink-phpwebdriver": "1.2.*",
+        "oleg-andreyev/mink-phpwebdriver": "1.3.*",
         "filp/whoops": "^2.15"
     },
     "autoload-dev": {
@@ -25,7 +25,7 @@
     "minimum-stability": "dev",
     "prefer-stable": true,
     "require": {
-        "php": ">=8.0.0",
+        "php": ">=8.1.0",
         "ext-iconv": "*",
         "ext-mbstring": "*",
         "ext-curl": "*",