(DOCSP-12300): Add release notes for v0.3.1 and v0.4.0

Author: jeff-allen-mongo

source/changelog.txt

@@ -12,8 +12,85 @@
    :depth: 1
    :class: singlecol
 
-v0.2.2 - Current Release
-------------------------
+v0.4.0
+------
+
+*Released September 15, 2020*
+
+Improvements
+~~~~~~~~~~~~
+
+Adds support for the following methods:
+
+- :method:`db.collection.mapReduce()`
+
+- :method:`db.collection.validate()`
+
+Adds support for ``maxAwaitTimeMS`` for cursors.
+
+v0.3.1
+------
+
+*Released September 14, 2020*
+
+Improvements
+~~~~~~~~~~~~
+
+This release adds support for:
+
+- New ``cursor`` methods 
+
+- Query ``planCache`` methods
+
+- Error helper methods
+
+- The following helper commands:
+
+  - ``show users``
+  - ``show profile``
+  - ``show logs``
+  - ``show log[<name>]``
+
+This release includes an ``.rpm`` artifact which can be downloaded from
+the `MongoDB Download Center
+<https://www.mongodb.com/download-center/community?jmp=docs>`__.
+
+Behavior Updates
+~~~~~~~~~~~~~~~~
+
+The legacy ``mongo`` shell error handling different was not consistent
+between commands. ``mongosh`` now standardizes the user-facing behavior
+here. Whenever a shell helper issues a db command that results in
+``{ ok: 0 }`` ``mongosh`` throwsan error. Running the raw command,
+however, does not throw an exception and prints the server output.
+
+Bug Fixes
+~~~~~~~~~
+
+- :issue:`MONGOSH-323 <MONGOSH-323>`: getUser() userId field is
+  outputted as binary.
+
+- :issue:`MONGOSH-337 <MONGOSH-337>`: Linux tarball is not gzipped.
+
+- :issue:`MONGOSH-341 <MONGOSH-341>`: Wrong values with NumberLong for
+  numbers > Number.MAX_SAFE_INTEGER. As a result of this fix, values
+  passed to ``NumberLong`` and ``NumberDecimal`` must be strings.
+
+  .. important::
+
+     The fix for :issue:`MONGOSH-341 <MONGOSH-341>` is a breaking
+     change when compared to behavior in the legacy ``mongo`` shell.
+
+- :issue:`MONGOSH-346 <MONGOSH-346>`: ``Ctrl+C`` does not terminate the
+  currently running command in the shell.
+
+  .. note::
+
+     ``Ctrl+C`` terminates the process in the shell, but does not
+     terminate the process on the mongodb server.
+
+v0.2.2
+------
 
 *Released August 31, 2020*
 
@@ -26,6 +103,7 @@ This release adds support for the following APIs:
   :method:`db.currentOp()`. More detail in
   :issue:`MONGOSH-307 <MONGOSH-307>`.
 
+
 - Free monitoring commands such as :method:`db.enableFreeMonitoring()`.
   More detail in  :issue:`MONGOSH-300 <MONGOSH-300>`.