background-jobs

Is your feature request related to a problem? Please describe.
Hi and thank you for this project!

I have the following use case:

1. A customer registers to a program where he needs to send data 3 times per X days
2. After X days I want to check if the customer has indeed sent data 3 times

So when the customer registers I want to schedule a job "check now in X days". It has to be the

It would be great if null values would be supported as fields of inputData.
Currently, this fails, because flutter_workmanager explicitly checks for compatible types: https://github.com/vrtdev/flutter_workmanager/blob/e237220996c3238fa2e47da0994cb6832e557a0b/lib/src/workmanager.dart#L210-L220

Thus, calling the following method will throw an Exception:

Workmanager.registerOneOff

Supported scenarios and unsupported scenarios are not well explained outside the example on the README.

Improve Documentation with more examples and explanations of what will/won't work.

• Set up Github Pages site with great documentation

• Improve & Update README

• XML <summary> tags on classes & methods.