2.4.0: Retry accessor

• Merged PR #48: Extend error handling to include if a write was retried
  (@thekid)

2.3.1: No primary fix

• Fixed "undefined index primary" when no primary is available - @thekid

2.3.0: XP 12 compatibility

• Made compatible with XP 12 - @thekid

2.2.0: FindAndModify

• Merged PR #44: Add equals() methods for wrapper classes - @thekid
• Merged PR #45: Implement Collection modify() and remove() via
  https://www.mongodb.com/docs/manual/reference/command/findAndModify/
  (@thekid)
• Fixed upsert() inconsistency with update() and delete() in how
  it handles the query parameter
  (@thekid)

2.1.0: Retry NotPrimary

• Merged PR #43: Retry "Exception: not primary" when writing (fixes #42)
  (@thekid)

2.0.0: Command options

The second major release adds the possibility to pass additional options to all commands, including read preference as well as read and write concerns.

• Merged PR #40: Implement read and write concerns, implementing #11.
  See https://www.mongodb.com/docs/manual/reference/read-concern/ and
  https://www.mongodb.com/docs/manual/reference/write-concern/
  (@thekid)
• Merged PR #41: Remove deprecated Collection::command(), superseded in
  1.4.0 with the new run() method, see #21.
  (@thekid)
• Merged PR #39: Refactor all methods to receive options varargs. Passing
  additional options to methods such as find can be accomplished by
  creating Options instances.
  (@thekid)

1.15.0: Authentication mechanism negotiation

• Merged PR #38: Support authentication mechanism negotiation. This way,
  we default to using SCRAM-SHA-256 if the server supports it as mandated
  by the specification.
  (@thekid)

1.14.0: SCRAM-SHA-256

• Merged PR #37: Implement SCRAM-SHA-256 authentication. Implements #8
  (@thekid)

1.13.0: Fix "cursor id ... not found"

• Merged PR #36: Introduce Commands class which keeps all messages on the
  same connection, fixing #29 (Error: cursor id "..." not found). Note:
  This changes the low-level internal API inside the io package!
  (@thekid)

1.12.0: Document property references

• Merged PR #35: Return document properties by reference - @thekid