TypeScript configuration transpiling all `.ts` files in project?

I’m attempting to add cypress@3.0.3 and cypress-cucumber-preprocessor@1.2.2 with tsify@4.0.0 to an existing Angular 6 project. However, I am getting a TypeScript transpilation error in some code located outside of the cypress directory when running any test, even the stock JavaScript examples provided with Cypress.

If I do not have any .feature files or corresponding TypeScript step definitions, I get an error of the form:

 Oops...we found an error preparing this test file:
...
This occurred while Cypress was compiling and bundling your test code. This is usually caused by:

A missing file or dependency
A syntax error in the file or one of its dependencies
Fix the error in your code and re-run your tests.

If I have added .feature file & corresponding step definition, the same TypeScript error gets referenced by way of a plugin error:

Error running plugin
The following error was thrown by a plugin. We've stopped running your tests because a plugin crashed.
...

I am using the cypress/plugins/index.js configuration provided in the README.md. The same occurs with or without a cypress/tsconfig.json. From testing, I suspect that the tsify babel plugin is either ignoring entirely or perhaps always using the root tsconfig.json rather than the one closest to the cypress code.

How can I configure cypress with cypress-cucumber-preprocessor to only transpile TypeScript code inside of the cypress directory?

[mhodgson]

Cool. I opened a PR to simplify the README: #92

[cookiescrumbs]

Does using '@cypress/browserify-preprocessor' fix this https://github.com/TheBrainFamily/cypress-cucumber-preprocessor/issues/61?