Need TypeScript support

[mikevetkin]

When import:

import { transcribe } from 'tengwar';

has error:

Could not find a declaration file for module 'tengwar'. '/Users/mvetkin/coding/obsidian-tengwar/node_modules/tengwar/tengwar.js' implicitly has an 'any' type.
  Try `npm i --save-dev @types/tengwar` if it exists or add a new declaration (.d.ts) file containing `declare module 'tengwar';`ts(7016)