GH Actions: version update for various predefined actions

A number of predefined actions have had major release, which warrant an update the workflow(s).

These updates don't actually contain any changed functionality, they are mostly just a change of the Node version used by the action itself (from Node 14 to Node 16).

Refs:
* https://github.com/actions/checkout/releases
* https://github.com/actions/download-artifact/releases
* https://github.com/actions/upload-artifact/releases

Author: jrfnl

.github/workflows/phpstan.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2

.github/workflows/test.yml

@@ -26,7 +26,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
@@ -39,7 +39,7 @@ jobs:
         run: php scripts/build-phar.php
 
       - name: Upload the PHPCS phar
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         if: ${{ success() && matrix.php == '8.0' }}
         with:
           name: phpcs-phar
@@ -48,7 +48,7 @@ jobs:
           retention-days: 28
 
       - name: Upload the PHPCBF phar
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         if: ${{ success() && matrix.php == '8.0' }}
         with:
           name: phpcbf-phar
@@ -89,7 +89,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Setup ini config
         id: set_ini
@@ -159,7 +159,7 @@ jobs:
         run: composer validate --no-check-all --strict
 
       - name: Download the PHPCS phar
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v3
         with:
           name: phpcs-phar
 

.github/workflows/validate.yml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Install xmllint
         run: sudo apt-get install --no-install-recommends -y libxml2-utils
@@ -63,7 +63,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Install PHP
         uses: shivammathur/setup-php@v2