Adds safety to the changeParameterValueAsync on workbook

[cammanderson]

In the case that parameters change before the workbook has loaded, it can throw an exception and break the application.

This pull request adds safety to the call to changeParameterValueAsync().

The developer will still need to handle their possible race condition with changing parameters before the workbook loads, but this will ensure that the component does not throw an exception.

[coopermaruyama]

Fixed conflicts and merged. thank you