🛠 Fix/typescript support 32

[MrCube42]

Fixes #32

Problem

Cypress does not fully support TypeScript out-of-the-box (cypress-io/cypress#1859). Currently Cypress accepts .ts files and the schematic already sets up everything for the IDE (like VSCode) to work. However, TypeScript itself cannot be used during executing because it is not transpiled by default.

Solution

Add TypeScript preprocessor like proposed in Cypress docs to the schematic by default (https://docs.cypress.io/guides/tooling/typescript-support.html#Transpiling-TypeScript-test-files).

Steps taken

Based on the already prepared solution from Gleb @ Cypress (https://github.com/bahmutov/add-typescript-to-cypress):

• Use simpler version of cypress/tsconfig (@anthonymjones Not really sure whether we actually need the types and target like before. As Gleb himself doesn't add them, I suppose we can just remove them)
• Transpile TypeScript files by adding a Cypress plugin by default which uses @cypress/webpack-preprocessor (This dependency was already listed by the schematic)
• Set an explicit type in the default spec.ts to show everyone that TypeScript actually works (not only the .ts ending)
• Adjust unit tests to now contain 2 more files which are added by the plugin integration

[anthonymjones]

Looks and works great, thank you for your contribution @MrCube42!