Update colinmollenhour/credis library

[orlangur]

Description

Fixed Issues

1. There is at least one bug in this library affecting Magento installations: Redis Cache error #9875, Upgrade from Magento CE 2.1.9 to 2.2.0 - Element 'block', attribute 'class': [facet 'pattern'] The value '\Magento\Framework\View\Element\Template' is not accepted by the pattern '[A-Z][a-zA-Z\d]*(\\[A-Z][a-zA-Z\d]*)*'. #11110 (comment)
2. There are new features in-demand by Magento developers: Consider credis library update to allow Redis Sentinel cluster usage #10962
3. Probably Redis cache need Fix #10524 will be fixed as well

Manual testing scenarios

1. Configure Redis as session storage
2. Configure Redis as cache storage
3. Run some Selenium-based functional/acceptance tests to check that at least main Magento scenarios are not broken

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)

[maderlock]

There are serious problems since 2.1.8 in the 2.1.x branch, so assuming this fixes #10524, please please port this to 2.1 once you've finished with 2.2.

Please.

Those of us using 2.1 are screwed otherwise as we currently cannot use Redis at all. Thanks.

[maderlock]

OMG - is that the extent of the fix? OK, I'll test this on 2.1.9.

[orlangur]

Closing in favor of #11222.