no linting is available in the project

The project has no linting, currently
#464 removed the reference to `tslint` (though it is not mentioned in the commit)

While it might have been better to add a lint script in `package.json` instead of removing `tsling`, the [recommendation is `eslint`, now](https://code.visualstudio.com/api/advanced-topics/tslint-eslint-migration).

Having a linter would be a good start towards a common style (and also to avoid common mistakes).

Start by reviewing package.json and the history around issue #464 to understand how the removed tslint reference affected the project. Evaluate the stated ESLint recommendation and verify that the project has a usable linting entry point and documented common-style checks when the work is complete.

Written by the indexing model from the issue text.