Complete TS migration type conversions

[parkerduckworth]

The PR which migrated this client from untyped javascript to typescript included some types, but not all of them. Now there are a remainder of any types which should be assigned their proper types, where possible.

A quick way to determine where these changes need to be made can be done by grepping the repo for : any.

[dirkkul]

incomplete PRs that only migrate some types are also welcome :)

[parkerduckworth]

All communication regarding this issue should be moved to the new typescript client repo.