85 fix interception - Githubissues

Refactored interceptor class to get working in Playwright;
Fixed interceptor example tests to get working after refactored interceptor class;
Fixed elementsActions example tests.
Fixed some tests to get working on firefox.
Updated readme file.

Example tests: Chrome - all pass; Firefox - only Visual regression tests are failing. Webkit - multiple tests failing - will be fixed in future.

devbridge / test-juggler