outdated dependency on bfx-api-node-util

[dutu]

Issue type

• bug
• missing functionality
• performance
• feature request

Brief description

Please update dependency on module bfx-api-node-util to get rid of the warning Invalid 'main' field in package.json

Steps to reproduce

• see Invalid 'main' field in package.json' of './dist/index.js'. bfx-api-node-util#19

Additional Notes: