udpate DS lib (0xPolygonHermez#2866)

add response headers to all http responses (0xPolygonHermez#2829)

set synchronizer sequential mode as default (0xPolygonHermez#2807)

* set sequential mode as default

cherry pick the latest WS improvements into v0.4.0 (0xPolygonHermez#2800

)

increase maxWorkers from 16 to 32

replace WS notification concurrency to avoid congestion limiting the …

…number of workers

refactoring the mechanism to notify new logs

more logs; return filter copy; more concurrency

fix UninstallFilterByWSConn when the wsConn has no filters installed

fix filter storage when deleting filters by wsConn