Remove symfony/console from 'require' section.

[greg-1-anderson]

I'm doing some Drush work to use consolidation/config, which uses grasmash/yaml-expander.

Config has to be loaded very early in the bootstrap process. For various reasons, I'd like to limit the number of projects touched during this phase of the code.

grasmash/yaml-expander declares that it uses symfony/console, when in fact it does not. This PR removes symfony/console from the require section. This reduces the number of components loaded when installing with no-dev, but it has no affect on the packages loaded when including the require-dev packages, as satooshi/php-coveralls requires symfony/console.

I don't want to remove satooshi/php-coveralls from grasmash/yaml-expander, of course, but if I remove it on my local system, then symfony/console is removed, and the phpunit tests still pass.

So, while this PR has no affect on the actual operation of this project, for documentation purposes, I would prefer it if symfony/console were not listed in the require section. require-dev would be fine, although this is not necessary AFIK due to satooshi/php-coveralls.

[coveralls]

Coverage remained the same at 100.0% when pulling 411574e on greg-1-anderson:no-console into 95f9c87 on grasmash:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 411574e on greg-1-anderson:no-console into 95f9c87 on grasmash:master.

[coveralls]

Coverage remained the same at 100.0% when pulling 411574e on greg-1-anderson:no-console into 95f9c87 on grasmash:master.