v8.3.0

New features:

• Update GOV.UK Frontend to v2.3.0
• Add Notify integration guidance
• Add npm install reminder when prototype crashes
• Add step by step navigation

Internal:

• Removed minimist dependency - thanks to @dylmye
• Fix path for page templates in tutorials-and-examples - thanks to @denizgenc
• Add standardjs and supertest to dev dependencies - thanks to @simoneduca
• Setup exclusion list for the generated ZIP download