Upgrade to PHP 8.4 and update dependencies

- Updated `.gitlab-ci.yml` to use `chill/base-image:8.4-edge` across all stages.
- Updated `composer.json` to require PHP `^8.4` and upgraded `lexik/jwt-authentication-bundle` to `^3.1.1`.

.gitlab-ci.yml

@@ -46,7 +46,7 @@ stages:
 
 build:
     stage: Composer install
-    image: chill/base-image:8.3-edge
+    image: chill/base-image:8.4-edge
     before_script:
         - composer config -g cache-dir "$(pwd)/.cache"
     script:
@@ -61,7 +61,7 @@ build:
 
 code_style:
     stage: Tests
-    image: chill/base-image:8.3-edge
+    image: chill/base-image:8.4-edge
     script:
         - php-cs-fixer fix --dry-run -v --show-progress=none
     cache:
@@ -74,7 +74,7 @@ code_style:
 
 phpstan_tests:
     stage: Tests
-    image: chill/base-image:8.3-edge
+    image: chill/base-image:8.4-edge
     dependencies:
         - build
     variables:
@@ -86,7 +86,7 @@ phpstan_tests:
 
 rector_tests:
     stage: Tests
-    image: chill/base-image:8.3-edge
+    image: chill/base-image:8.4-edge
     dependencies:
         - build
     before_script:
@@ -122,7 +122,7 @@ lint:
 
 unit_tests:
     stage: Tests
-    image: chill/base-image:8.3-edge
+    image: chill/base-image:8.4-edge
     dependencies:
         - build
     variables: