v1.9.0

The last 1.x release published to npm, kept for anyone still pinned to it.

npm install apps-script-utils@1.9.0

Changes

• improve tsconfig and development environment (23e4c15)
• formatting (c4e0f5c)

The 1.x tags before this one have been removed; their history remains in CHANGELOG.md.

Upgrading: 2.x changes the signatures of several sheet and slide functions. The 2.1.1 release notes list every breaking change.