v2.40.0

What's Changed

• chore: improve examples by @thenswan in #1935
• feat(TCK): Implement Account Update/Delete by @0xivanov in #1988
• feat: update security parameters when updating the addressbook by @matteriben in #1901
• feat: Create Client with external ExecutorService by @0xivanov in #1987
• release: v2.40.0 by @0xivanov in #2001

Full Changelog: v2.39.0...v2.40.0