Stop npm deprecate now all modules are deprecated (#4690) Signed-off-by: Simon Stone <sstone1@uk.ibm.com>

[Master] expose clientIdentity in getNativeAPI (#4617) Signed-off-by: Dave Kelsey <d_kelsey@uk.ibm.com>

[Master] Move experimental features to 0.20 (#4593) Signed-off-by: Dave Kelsey <d_kelsey@uk.ibm.com>

[0.19.x] cache enableHistorian flag (#4574) Signed-off-by: Dave Kelsey <d_kelsey@uk.ibm.com>

[Master] ensure logging files are flushed for CLI (#4480) Signed-off-by: Dave Kelsey <d_kelsey@uk.ibm.com>

[Master] Experimental Pluggable Query Handler (#4537) This is an experimental feature for composer and as such is not documented. Signed-off-by: Dave Kelsey <d_kelsey@uk.ibm.com>

[0.19.x] Rest server can be terminated by client (#4531) A client listening on a web socket can terminate the rest server if it is badly behaved and doesn’t cleanly disconnect Signed-off-by: Dave Kelsey <d_kelsey@uk.ibm.com>

[Master] Allow txid to be passed to query requests (#4500) Signed-off-by: Dave Kelsey <d_kelsey@uk.ibm.com>

[0.19.x] Allow txid to be passed to query requests (#4499) Signed-off-by: Dave Kelsey <d_kelsey@uk.ibm.com>

[Master] Improve perf logging (#4495) * Log connect/disconnect, improve query perf log Signed-off-by: Dave Kelsey <d_kelsey@uk.ibm.com> * Improvements based on example Signed-off-by: Dave Kelsey <d_kelsey@uk.ibm.com>