Various v6 breaking changes (#741)

Author: jordan-smith721

source/upgrade.txt

@@ -76,6 +76,16 @@ Version 6.x Breaking Changes
 - Automatic Encryption methods are now in the {+driver-short+}. You must
   import these methods from the driver instead of from
   ``mongodb-client-encryption``.
+- Removed the ``ObjectId`` constructor that accepted a 12-character string.
+- Modified ``abortTransaction()`` and ``commitTransaction()`` methods to return
+  ``null`` instead of the raw command results.
+- Removed connection option helpers that accepted values other than ``true``
+  or  ``false`` as booleans. You must provide either ``true`` or ``false`` values in
+  the connection string or to the MongoClient constructor.
+- Removed the ``Binary`` BSON type constructor that accepted a string.
+- The ``Binary.write()`` method no longer accepts a string to write to the binary
+  BSON object.
+- The ClientEncryption API returns promises instead of callbacks.
 
 .. _node-breaking-changes-v5.x:
 

source/whats-new.txt

@@ -60,6 +60,22 @@ What's New in 6.0
      import these methods from the driver instead of from
      ``mongodb-client-encryption``.
 
+   - Removed the ``ObjectId`` constructor that accepted a 12-character string.
+
+   - Modified ``abortTransaction()`` and ``commitTransaction()`` methods to return
+     ``null`` instead of the raw command results.
+
+   - Removed connection option helpers that accepted values other than ``true``
+     or ``false`` as booleans. You must provide either ``true`` or ``false`` values in
+     the connection string or to the MongoClient constructor.
+
+   - Removed the ``Binary`` BSON type constructor that accepted a string.
+
+   - The ``Binary.write()`` method no longer accepts a string to write
+     to the binary BSON object.
+
+   - The ClientEncryption API returns promises instead of callbacks.
+
 The {+driver-short+} v6.0 release includes the following features:
 
 .. important:: Deprecation Notice