Changes
** Bug
* [PHPC-1043] - phongo_execute_query() may leak cursor struct on error
* [PHPC-1053] - UTCDateTime constructor reports that its single argument is required
* [PHPC-1057] - Refactor option parsing for execute methods
* [PHPC-1072] - phongo_execute_command() leaks BSON reply on error
** Epic
* [PHPC-934] - PHPC MongoDB 3.6 Support
** New Feature
* [PHPC-967] - Add support for reading and writing OP_COMPRESSED
* [PHPC-975] - Array Update Improvements
* [PHPC-979] - OP_MSG support
* [PHPC-980] - Implement Drivers Sessions API
* [PHPC-986] - All writes retryable support
* [PHPC-987] - Causally Consistent Reads support
* [PHPC-993] - Parse localLogicalSessionTimeoutMinutes from isMaster response
* [PHPC-1015] - Implement Initial DNS Seedlist discovery spec
* [PHPC-1027] - Introduce classes for deprecated BSON types
* [PHPC-1029] - Support maxTimeMS getMore option for tailable command cursors
* [PHPC-1042] - Support options array for BulkWrite, Command, and Query execute methods
** Task
* [PHPC-599] - Document 32-bit platform limitation for Timestamp arguments
* [PHPC-834] - Add Read, ReadWrite, and Write command execute methods
* [PHPC-995] - Drop support for MongoDB 2.4
* [PHPC-1035] - Improve server compatibility error messages for wire version checks
* [PHPC-1036] - Update test suite for MongoDB 3.6
* [PHPC-1037] - Upgrade bundled libmongoc and libbson to 1.9
* [PHPC-1039] - Non data-bearing servers must be excluded when determining if a cluster supports sessions
* [PHPC-1047] - Add MongoDB 3.6 to test framework
* [PHPC-1048] - Rename phongo_execute_write to phongo_execute_bulk_write
* [PHPC-1070] - Create macro for accessing zval class or type name
** Improvement
* [PHPC-709] - Debuglog timestamp does not contain micro/nanoseconds
* [PHPC-969] - Have TCP keepalive default to true
* [PHPC-1031] - Run configure check to use ASN1_STRING_get0_data over ASN1_STRING_data in bundled libmongoc
* [PHPC-1071] - Report class name in exception for unexpected object values