Typescript declaration files should use top-level import/export.

[threehams]

There's a long discussion in microsoft/TypeScript#4665 about this. We can prevent possible global pollution problems by removing module declarations, and just using plain old ES6 import/exports within reselect.d.ts, as long as the first statement in the file is import or export.

Plus, it's a lot more familiar, since it directly mirrors ES6 modules.

[aikoven]

Resolved in #224.