Fixed optional param in JSDoc and generated TS definition

[mirao]

Motivation: To have working Resemble methods in TypeScript tests + autocompletion by IntelliSense in VSCode.

If TS definition doesn't exist, you get this in your TS test: If TS definition exists, everything works well:

I think it solves #77

I fixed:

• Param options in JSDoc was set as optional (https://jsdoc.app/tags-param.html#optional-parameters-and-default-values) so that generated TS definition allows omit it (otherwise TS check fails when calling I.see* without that)
• TS definition was created by npx -p typescript tsc index.js --declaration --allowJs --emitDeclarationOnly, see https://www.typescriptlang.org/docs/handbook/declaration-files/dts-from-js.html

[puneet0191]

thanks a lot for your PR, I will prepare new version.