v4.0.0

What's Changed

• Add Pest architecture tests by @SebKay in #75
• Code formatting by @SebKay in #76
• Start adding Pest mutation testing by @SebKay in #77
• Remove Organisations by @SebKay in #78
• Temporarily remove mutation testing by @SebKay in #80
• Use the Vue composition API by @SebKay in #81
• Continued Pest mutation testing by @SebKay in #79

Full Changelog: 3.1.0...4.0.0