Ruby driver: convert time values in json results

Review 1059 by @mlucy
Issue #1719
adding polyglot test for pseudotype conversion
adding new date test for javascript outside the polyglot tests because the polyglot tests can't check if two js Date objects are equal
NOTES for 1.11.1

Reviewed by @mglukhovsky
Bump client driver versions
Merge v1.11.1 into next