Bump symfony/cache from 3.4.29 to 4.3.9 in /app#1

dependabot[bot] wants to merge 1 commit intomasterszymonSys/symfonyBlog:masterfrom

dependabot/composer/app/symfony/cache-4.3.9szymonSys/symfonyBlog:dependabot/composer/app/symfony/cache-4.3.9Copy head branch name to clipboard