[mock-chronik-client] Support history() calls without pageNumber and pageSize specified

Summary:
Oversight uncovered while developing D15784

Support behavior of chronik-client for these endpoints.

Test Plan: npm test, CI for existing applications

Reviewers: #bitcoin_abc, emack

Reviewed By: #bitcoin_abc, emack

Differential Revision: https://reviews.bitcoinabc.org/D15794