Improve Test Coverage For `to` as object & function

[majew7]

Requested Update

Enhance test.js - describe('react-passage', () => {})

Provide consistent coverage for:

• to string
• to as location object - and pathname, search, hash, state
• to as function and pathname, search, hash, state

Why Is This Update Needed?

The to property of React Passage's Link accepts a string, object or function which is higher complexity than just working with a url string.

Currently test.js tests are light, and do an incomplete job ensuring that Passage's Link are working correctly by retain all the relevant values pathname, search, hash, state.

Are There Examples?

One example of light coverage:
it('matches with a function that returns a location object', () => {})
The incompleteness is missing coverage to ensure state is passed through.