update notes re sonatype central migration

publish to central.sonatype.com

release manually, not on every commit

update comment

readme update

Update readme.md

migration note

use `ThisBuild/sonatypeCredentialHost`

update readme re sonatype credential host

update self-version :)

fixup: make tagVersionRegex support both long and short form of tags

do not trigger build for tags

quickfix - forgot to drop this leftover... (#102)

upgrade deps (#101)

improve scheduled release jobs (prevent duplicate releases) (#100)