Better esm/cjs packaging

• Implement cjs/esm packaging lessons learned from async-injection.
• No code changes.

Optional merge array behavior during config merge

• When merging config, allow for lodash merge of arrays (overriding the default union behavior introduced in v1.0.3).
• Update patch level dependencies

Intuitive config merging

• When merging config, union arrays (instead of right replacing left).

No functional changes

Improve index.ts

No functional changes

• Expose some constants.
• Fix documentation typos.

Initial release

• All new!