6.4.0

Features

• When using stage-product, the --product-version can use the placeholder latest.
  This finds the highest semvered available product (of --product-name) version to stage.
• When using stage-product the config file provided can be any config file,
  just as long as it has product-version and product-name.

Bug Fixes

• tl;dr: Collections are hard.

  We are reverting code for handling collections when updating their values.
  As of recently, we tried to make collection property updating for products more idempotent.
  This required logic to associate collections in a config file with their potential GUID in the already configured product.
  This logic introduced edge cases, which we missed.
  We tried to fix them, but kept running into them.
  We've made the decision to revert the logic to its original state.
  Please see the original issue #207 for more information.