v3.9.0

• Adds a timeout in maxAge and staleIfError so that they do not infinitely wait for the cache to start and instead use a specified connectionTimeout when specified in opts.
• Adds a circuit breaker in maxAge and staleIfError so that when the cache fails to start it will hold off before starting again. This is only active if connectionCircuitBreakerOptions is specified in opts.
• Emits an event when fails to connect to the cache