v2.0.4

• eupdated default export directive.

v2.0.3: removed type module directive to make it work in cjs environment by d…

• removed type module directive to make it work in cjs environment by default.

v2.0.2

• return an empty array instead of undefined when empty.

v2.0.1

• fixed the custom header dump issue.

v2.0.0: codebase refactor

• codebase refactor
• breaking changes.
• exports for the browser, node and google apps script.

v1.0.1

• updated usage in the readme.

v1.0.0: cc and bcc support.

• cc and bcc support.
• html messages with plaintext alternative.
• refactor codebase.