1.2.1: Support GETTer only properties (OSK-7) (#8)
Motivation ---- The current implementation requires both GETter/SETters to be used, but there can be GETters only Modifications ---- * Adjusted InvokerFactory to account for the GETter only case * Adjusted FastInvoker to handle the change * Added unit tests for use case Result ---- GETter only is allowed Fixes #7