nx: "@nrwl/cypress:cypress" builder fails when "@nguniversal/builders:ssr-dev-server" is used as the "devServerTarget"

Expected Behavior

I expect to run e2e tests normally with Nx Cypress builder, even when app is using Angular Universal builder.

Current Behavior

The command is failing with the following error:

Schema validation failed with the following errors:
  Data path "" should NOT have additional properties(watch).

Failure Information

Steps to Reproduce

1. npx create-nx-workspace@latest repro-workspace
2. Select “angular” as application to include
3. npm run ng add @nguniversal/express-engine
4. Change the devServerTarget option in @nrwl/cypress:cypress to repro-workspace:serve-ssr
5. npm run nx e2e repro-workspace-e2e

Context

NX Report

@nrwl/angular : 9.1.4
@nrwl/cli : 9.1.4
@nrwl/cypress : 9.1.4
@nrwl/eslint-plugin-nx : Not Found
@nrwl/express : Not Found
@nrwl/jest : 9.1.4
@nrwl/linter : 9.1.4
@nrwl/nest : Not Found
@nrwl/next : Not Found
@nrwl/node : Not Found
@nrwl/react : Not Found
@nrwl/schematics : Not Found
@nrwl/tao : 9.1.4
@nrwl/web : 9.1.4
@nrwl/workspace : 9.1.4
typescript : 3.8.3

Angular

Angular CLI: 9.1.0
Node: 12.13.0
OS: darwin x64

Angular: 9.1.0
... animations, cli, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... platform-server, router
Ivy Workspace: Yes

@angular-devkit/architect: 0.900.6
@angular-devkit/build-angular: 0.901.0
@angular-devkit/build-optimizer: 0.900.7
@angular-devkit/build-webpack: 0.900.7
@angular-devkit/core: 9.0.6
@angular-devkit/schematics: 9.0.7
@ngtools/webpack: 9.0.7
@nguniversal/builders: 9.0.2
@nguniversal/common: 9.0.2
@nguniversal/express-engine: 9.0.2
@schematics/angular: 9.0.7
@schematics/update: 0.901.0
rxjs: 6.5.4
typescript: 3.8.3
webpack: 4.42.0

If you comment out line 114 in node_modules/@nrwl/cypress/src/builders/cypress/cypress.impl.js, it works. This is happening because watch is not a valid property of the @nguniversal/builders:ssr-dev-server builder. You might want to make extra options configurable as an object and not just the watch property.