Upgraded requirement for "symfony/console".

[galliraf]

Upgraded requirement for "symfony/console" due to conflicting requirements in proper.io repository.
Commands tested successfully:

./bin/migrate -h
./bin/migrate -h -q
./bin/migrate -V
./bin/migrate --version
./bin/migrate -h --ansi
./bin/migrate -V --ansi
./bin/migrate -h --no-ansi
./bin/migrate -h -n
./bin/migrate -h -v
./bin/migrate -h -vvv
./bin/migrate -h -vv
./bin/migrate list
php ./bin/migrate list --raw
php ./bin/migrate list --format=xml
php ./bin/migrate list
php ./bin/migrate list test
php ./bin/migrate migrate:addenv
php ./bin/migrate migrate:create
./bin/migrate migrate:init testforupgrade
./bin/migrate migrate:up testforupgrade
./bin/migrate migrate:down testforupgrade

[dirk-proper]

Approved. I don't see this breaking anything.