fix: update publish to include directories

[grant]

Update package to use ** file glob.

Tested:

npm pack > @google-cloud/functions-framework@1.10.0 prepare /Users/timmerman/Documents/github/googlecloudplatform/functions-framework-nodejs > npm run compile > @google-cloud/functions-framework@1.10.0 compile /Users/timmerman/Documents/github/googlecloudplatform/functions-framework-nodejs > tsc -p . npm notice npm notice 📦 @google-cloud/functions-framework@1.10.0 npm notice === Tarball Contents === npm notice 11.4kB LICENSE npm notice 8.2kB build/src/middleware/background_event_to_cloudevent.js npm notice 6.8kB build/src/middleware/cloudevent_to_background_event.js npm notice 2.5kB build/src/cloudevents.js npm notice 702B build/src/functions.js npm notice 4.1kB build/src/index.js npm notice 9.3kB build/src/invoker.js npm notice 6.1kB build/src/loader.js npm notice 1.7kB build/src/logger.js npm notice 2.9kB build/src/pubsub_middleware.js npm notice 1.9kB build/src/router.js npm notice 4.6kB build/src/server.js npm notice 1.2kB build/src/types.js npm notice 1.5kB package.json npm notice 13.1kB CHANGELOG.md npm notice 9.8kB README.md npm notice 1.1kB build/src/middleware/background_event_to_cloudevent.d.ts npm notice 911B build/src/middleware/cloudevent_to_background_event.d.ts npm notice 1.2kB build/src/cloudevents.d.ts npm notice 2.7kB build/src/functions.d.ts npm notice 31B build/src/index.d.ts npm notice 1.7kB build/src/invoker.d.ts npm notice 422B build/src/loader.d.ts npm notice 460B build/src/logger.d.ts npm notice 3.0kB build/src/pubsub_middleware.d.ts npm notice 478B build/src/router.d.ts npm notice 503B build/src/server.d.ts npm notice 179B build/src/types.d.ts npm notice === Tarball Details === npm notice name: @google-cloud/functions-framework npm notice version: 1.10.0 npm notice filename: google-cloud-functions-framework-1.10.0.tgz npm notice package size: 25.6 kB npm notice unpacked size: 98.8 kB npm notice shasum: bd8c396a221d5cfc18260dde3115b39cb714bcf4 npm notice integrity: sha512-4JTv/V9u5PVeG[...]s+cVqdJYiXryQ== npm notice total files: 28 npm notice google-cloud-functions-framework-1.10.0.tgz 

Fixes #327