Node.js agent v11.19.0

Notes

Added instrumentation for kafkajs (enabled through a feature flag) (#2237) (#2244) (#2236) (#2236) (#2251)

Added KafkaJS instrumentation and versioned tests skeleton (#2224) (fc13916)
Added KafkaJS to compatibility list (#2254) (f003ee7)
Implemented DT header injection for message specs (#2250) (3e6bc6d)
Removed targets for Kafka versioned tests (#2235) (838bab2)
Updated flaky when test (#2241) (4079a0a)
Updated readme to remove no longer relevant information (#2240) (01fb53c)
Updated versioned tests due to update in @newrelic/security-agent V1.3.0 (#2239) (982276c)

Migrated memcached tests to versioned tests (#2231) (0b3a928)
Ported when and q integration tests to versioned tests (#2233) (9a4dddc)
Updated ioredis tests to assert the host metric getting created on ioredis calls (#2230) (89df06a)
Updated unit tests that were missing constructing specs at instrumentation source (#2252) (54ab238)

We recommend updating to the latest agent version as soon as it's available. If you can't upgrade to the latest version, update your agents to a version no more than 90 days old. Read more about keeping agents up to date. (https://docs.newrelic.com/docs/new-relic-solutions/new-relic-one/install-configure/update-new-relic-agent/)

See the New Relic Node.js agent EOL policy for information about agent releases and support dates. (https://docs.newrelic.com/docs/apm/agents/nodejs-agent/getting-started/nodejs-agent-eol-policy/)