Add ESLint Curly Rule

[lewis-sqa]

This PR Includes

• Added ESLint curly rule.
• Applied auto fixes.
• Fixed ESLint configuration in examples/react
• Updated ESLint deps.

Notes

• I've written JavaScript code in the past where I sometimes omitted curlys (not consistently since multi-line blocks aren't supported unlike other languages such as Python), and it became quite difficult to later read code this way (as the ESLint docs also states) and I would often miss the body of the if statements when glancing over methods.
• In some respects, it's a similar approach to the default setting of allow-parens and arrowParens - while you can omit the parenthesises but it's more consistent, easier to modify and (arguably) more readable to apply them all the time.
• Ran into a weird issue in the React example where I'm getting key prop errors. It's apparently fixed but no luck after upgrading the package.