release v1.0.42

release 1.0,40

Merge pull request github#393 from github/release-1-0-36

release 1.0.36

Merge pull request github#368 from github/fix-infinite-cutover-loop

cut-over failure on test-on-replica starts replication again

Merge pull request github#352 from github/batch-apply-dml-events

Batch apply dml events

Merge pull request github#340 from github/release-1-0-32

updated release version following some changes I wish to release

Merge pull request github#327 from github/release-1-0-30

updated version

Merge pull request github#289 from github/concurrent-rowcount-default…

…s-true

concurrent-rowcount defaults 'true'

Merge pull request github#260 from github/hooks-nil-check

safe access to applier/inspector hostnames for hooks