gistfile1.txt

--(1755:Sun,11 Nov 18:$ )-- composer -vv install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Warning: The lock file is not up to date with the latest changes in composer.json. You may be getting outdated dependencies. Run update to update them.
Dependency resolution completed in 0.001 seconds
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Conclusion: remove symfony/symfony v3.4.18
    - don't install symfony/symfony v3.4.18|remove symfony/templating v4.1.7
    - don't install symfony/templating v4.1.7|don't install symfony/symfony v3.4.18
    - Installation request for symfony/symfony v3.4.18 -> satisfiable by symfony/symfony[v3.4.18].
    - Installation request for symfony/templating v4.1.7 -> satisfiable by symfony/templating[v4.1.7].