Improve static type analysis

[tonyketcham]

trafficstars

In numerous locations throughout the project, narrow types have been sidestepped with the any type.

These should be replaced with tighter type definitions to have better handling of data as it flows throughout the app.

[tonyketcham]

I'd suggest raising a PR of this pointed at an ESLint target branch, as ESLint won't pass the pipeline until those instances of any are removed.