Refactor to support TypeScript 5

[thejhh]

TypeScript 5 has improved and more standard decorator support which will make it possible to implement better code.

We'll need to upgrade to it.

Try to be backward compatible as much as possible.

The biggest change is that extra information is in a context object and new decorators can replace implementations if they return something.

Requires updates to project packages

Typescript

• Upgrade TypeScript to [email protected] or newer

Jest

• Upgrade Jest to [email protected], @types/[email protected], [email protected] or newer
• Install [email protected] or newer

See also

• https://devblogs.microsoft.com/typescript/announcing-typescript-5-0/#decorators
• https://2ality.com/2022/10/javascript-decorators.html#class-decorators