(Refactor) Fix linting errors

[phahulin]

Before submitting a pull request, please provide the following information:

• What is it? (leave one option)

  • (Refactor) of existing code (no functionality change)

• What was the root cause of the problem originally / what feature was missing? eslint reports warnings and errors on existing code

• How does this pull request solve it (in broad terms)? Fix them.

• Does it close any open issues? No

• Quick checklist

  • [X] eslint shows no errors

    cd web-dapp
    eslint .

  • [X] docs were updated where necessary OR they don't need to be updated
  • [X] tests were updated where necessary OR they don't need to be updated

[garatortiz]

It gave me error on web-dapp/build... maybe it needs to exclude the directory in the command.