Add step to free disk space

Author: kenjis

.github/workflows/phpunit.yml

@@ -95,6 +95,22 @@ jobs:
         options: --health-cmd="/opt/oracle/product/18c/dbhomeXE/bin/sqlplus -s sys/Oracle18@oracledbxe/XE as sysdba <<< 'SELECT 1 FROM DUAL'" --health-interval=10s --health-timeout=5s --health-retries=3
 
     steps:
+      - name: Free Disk Space (Ubuntu)
+        uses: jlumbroso/free-disk-space@main
+        with:
+          # this might remove tools that are actually needed,
+          # if set to "true" but frees about 6 GB
+          tool-cache: false
+
+          # all of these default to true, but feel free to set to
+          # "false" if necessary for your workflow
+          android: true
+          dotnet: true
+          haskell: true
+          large-packages: false
+          docker-images: true
+          swap-storage: true
+
       - name: Create database for MSSQL Server
         if: matrix.db-platforms == 'SQLSRV'
         run: sqlcmd -S 127.0.0.1 -U sa -P 1Secure*Password1 -Q "CREATE DATABASE test"