SSE support #653

Job	Run time
test-macos (1.20.x)	5m 3s
test (1.20.x)	4m 19s
test-conformance (benchmarks)	4m 50s
test-conformance (test-features)	3m 47s
test-conformance (test-conformance)	3m 4s
test-conformance (test-conformance-http)	3m 18s
test-conformance (test-conformance-nats)	3m 24s
test-conformance (test-conformance-nats-embedded)	3m 6s
test-conformance (test-conformance-ssl)	3m 14s
test-conformance (test-conformance-broker-http)	4m 11s
test-conformance (test-conformance-broker-redis)	4m 12s
test-conformance (test-conformance-broker-nats)	3m 45s
coverage	5s
	46m 18s

Provide feedback