refactor: reduce bundle size

[gregdolby]

• Removed 'joi'
• created custom publish options validation (our joi validation wasn't doing much in the first place, just warnings. all undefined properties would be validated)
• added tests for custom validation
• removed excess bundled files. only es module build with types exists now

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[gregdolby]

I am working through this e2e test failure and it has to do with the build output. Puppeteer needs umd build but I am trying to figure out how to get it to work with es module bundle.

[gregdolby]

I ended up adding umd bundle back. Jest tests and puppeteer run in node and they both support esm but for jest it is experimental.