Right now our tests run against MongoDB 4.2 and 4.4 and the docs page says we support 3.6 which we did not intend or test.

Recent queries have revealed some issues targeting pre-5.0 servers such as LINQ queries with a predicate comparing entities to null which we can't workaround.

We will remove 4.2 and 4.4 from the test matrix and mark the doc page at 5.0. None of this will stop people attempting to use older versions but will make it clearer where actual testing and support is focused.

As a bonus this will also improve build test times once these are removed from the evergreen.yml CI file and we can take the opportunity to also not test against two DRIVER_VERSION as we are pinned to one.