Updated composer.json with new library versions

[buskamuza]

Description

Updated composer.json with library versions that support PHP 7.2. Magento behavior is not validated/fixed. The purpose of the PR is to upgrade dependent libraries, so the work on separate libraries can be unblocked. The target branch is libs-upgrade, which is a temporary branch for libs upgrade work.

Includes https://github.com/magento-engcom/php-7.2-support/pull/30 (merged in). Main changes are in https://github.com/magento-engcom/php-7.2-support/pull/41/files#diff-a787f6a8f1d79db8c096cfe917d4d07b

Fixed Issues (if relevant)

1. magento/magento2#24: 3rd-party libraries do not support PHP 7.2

Contribution checklist

• [ ] Pull request has a meaningful description of its purpose
• [ ] All commits are accompanied by meaningful commit messages
• [ ] All new or changed code is covered with unit/integration tests (if applicable)
• [ ] All automated tests passed successfully (all builds on Travis CI are green)

[buskamuza]

https://github.com/magento-engcom/php-7.2-support/pull/86 covers the same