Feat chunk size improvements & updates

[germanf]

Changes

• path security issues npm audit fix
  • "minimist": "1.2.2" -> "1.2.3"
  • "@babel/cli": "7.4.3" -> "^7.8.4"
  • "@babel/register": "7.4.0" -> "^7.8.6"
  • "node-sass": "^4.12.0" -> "^4.13.1"
  • "webpack-pwa-manifest": "4.0.0" -> "^4.2.0"
• navigation menu entry for Exchange
  • DEx history component
  • DEx OrderBook component
  • DEx Orders component
  • DEx Pairs component

• refactoring react-icons package with @styled-icons to import only used icons and reduce chunk sizes

• added InfoCircleIcon to isolate InfoCircle icon styling
• update packages:
  • "connected-react-router": "6.4.0" -> "6.6.0"
  • "react": "16.8.6" -> "16.11.0"
  • "react-dom": "16.8.6" -> "16.11.0"
  • "react-redux": "7.0.2" -> "7.1.3"
  • "reactstrap": "^8.0.1" -> "^8.4.1"
  • "babel-plugin-transform-imports": "^2.0.0",
  • "compression-webpack-plugin": "2.0.0" -> "^3.1.0"
  • "jest-cli": "24.7.1" -> "^25.1.0"
  • "jest-styled-components": "6.3.1" -> "^7.0.0"
  • "node-plop": "0.18.0" -> "^0.25.0"
  • "minimist": "1.2.3" -> "^1.2.5"
  • "react-app-polyfill": "0.2.2" -> "
  • "terser-webpack-plugin": "1.2.3" -> "^2.3.5"
  • "webpack": "4.30.0" -> "4.36.0"
• removed unused file internals/config.js