Release 0.4.0

• Merge pull request #47 from oceanprotocol/feat/888-es-mappings-ddo (4365b44)
• fix: build issue with rollup typescript (ab63dec)
• fix: disable camelcase eslint for mapping names (26f1257)
• fix: audit (22ff592)
• fix: formatting (30c495c)
• feat: add es mappings for ddo (c3912ba)