add bn.js as explicit dependency

[faustbrian]

Trying to install eosjs with certain package managers like yarn berry or ones that use a strict validation mode will fail because bn.js is an implicit dependency and relying on implicit dependencies is generally bad practice and error-prone.

    eosjs tried to access bn.js, but it isn't declared in its dependencies; this makes the require call ambiguous and unsound.

    Required package: bn.js (via "bn.js")
    Required by: eosjs@npm:21.0.2 (via /home/runner/work/platform-sdk/platform-sdk/.yarn/cache/eosjs-npm-21.0.2-047daf3463-2.zip/node_modules/eosjs/dist/)

[jeffreyssmith2nd]

Thanks for the PR! Can you retarget it to the develop branch?

[faustbrian]

@jeffreyssmith2nd changed the target branch

[faustbrian]

Until this is merged and released people can use the following .yarnrc.yml as a workaround if they use yarn berry. This requires you to do yarn add bn.js to add bn.js as a dependency of your own project.

packageExtensions:
  "eosjs@*":
    dependencies:
      "bn.js": "^5.1.2"