build(deps): bump symfony/polyfill-php70 from 1.11.0 to 1.12.0
build(deps): bump symfony/polyfill-php70 from 1.11.0 to 1.12.0

Bumps symfony/polyfill-php70 from 1.11.0 to 1.12.0.

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
xparse/ElementFinder,xparse/ElementFinder