This bumps our typescript-eslint dependency to the latest version,

7.1.0. This contains support for modern TypeScript, as well as a

plethora of fixes and rules that were introduced since our now aging

5.59.2 release.
It also adds an explicit development dependency on TypeScript, ensuring

that we're consistent in what we depend on within the codebase for

linting. This avoids assumptions that can be made by the Babel support

and warnings that may be emitted when running ESLint within this

codebase.

Successfully linted and built the codebase.