MAIN: Fix warnings from dev dependencies

[Weetbix]

Fixes security warnings for dev dependencies of our dependencies (minimist + acorn).

• As part of this, the yarn node_modules structure seems to have changed and plugins are no longer working with ESLint unless they are specified in the package json, see: ESLint does not support plugins as dependencies of shared configs javascript-linters#2
  so thats why I added the prettier plugin to the package.json
• Prettier 2.0 has new defaults, mainly trailing commas and brackets for single param arrow functions. This project checks lint rules on commit, so Ive updated the files that were breaking because of this change.
• Ran yarn upgrade (fixes acorn dep)
• Added another module resolution for the karmatic sub module as there is no fix released yet for karmatic