[Bug] Duration and CurrentTime are Int32 instead of double, while VideoState has the correct type.

[the1mason]

Describe the bug
When using BlazoredVideo's Duration/CurrentTime proprty getter, an exception occurs.

To Reproduce
Steps to reproduce the behavior:

1. Get an instance of BlazoredVideo player
2. Try to access the Duration or CurrentTime property
3. Get an exception: https://gist.github.com/the1mason/138a879405e8c05b3983669774442394

Expected behavior
Properties' types are corresponding to their JS equivalents so getting them does not throws an exception

Hosting Model (is this issue happening with a certain hosting model?):

• Blazor WebAssembly