Polly v4.0.0 Release Notes

    • ➕ Add async support and circuit-breaker support for ContextualPolicy
    • ➕ Add manual control of circuit-breaker (reset and manual circuit isolation)
    • ➕ Add public reporting of circuit-breaker state, for health/performance monitoring
    • ➕ Add delegates on changes of circuit state
    • Thanks to @reisenberger