How to do mutation testing for Angular (with Stryker)

So I have an Angular project with around 30 unit tests, I want to validate my tests are actually testing something, so I want to add mutation tests. Stryker has been recommended to me. But I can't find any comprehensive guides for Angular mutation testing with Stryker.

I have stryker installed globally and I can run it on this repo: https://github.com/nicojs/angular-stryker-example

However when I try to add it to my code or vice versa I get serveral different errors, such as: to many open files, cant find ./src, unexpected token etc. Errors are never in my files, but probably in my configuration/installed packages.

So I want to know:

1. What packages to install
2. What commands to run
3. What configurations to change

Current package.json:

{
  "name": "angular-truffle-box",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test --browsers PhantomJS --code-coverage",
    "lint": "ng lint",
    "e2e": "ng e2e",
    "postinstall": "node patch.js",
    "trufflecompile": "truffle compile"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^7.0.0",
    "@angular/cdk": "^7.0.2",
    "@angular/common": "6.1.7",
    "@angular/compiler": "6.1.7",
    "@angular/core": "6.1.7",
    "@angular/forms": "6.1.7",
    "@angular/http": "6.1.7",
    "@angular/material": "^7.0.2",
    "@angular/platform-browser": "6.1.7",
    "@angular/platform-browser-dynamic": "6.1.7",
    "@angular/platform-server": "6.1.7",
    "@angular/router": "6.1.7",
    "arr-flatten": "^1.1.0",
    "core-js": "^2.5.4",
    "ganache-cli": "6.2.3",
    "hammerjs": "^2.0.8",
    "intl": "^1.2.5",
    "isarray": "^2.0.4",
    "phantomjs": "^2.1.7",
    "phantomjs-prebuilt": "^2.1.16",
    "rxjs": "^6.3.2",
    "tslint-sonarts": "^1.8.0",
    "web3": "^1.0.0-beta.36",
    "web3-utils": "^1.0.0-beta.36",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.8.0",
    "@angular-devkit/core": "0.8.1",
    "@angular/cli": "^6.2.1",
    "@angular/compiler-cli": "6.1.7",
    "@angular/language-service": "6.1.7",
    "@types/jasmine": "^2.8.6",
    "@types/jasminewd2": "^2.0.3",
    "@types/node": "^6.0.103",
    "codelyzer": "^3.2.2",
    "jasmine-core": "^2.99.1",
    "jasmine-spec-reporter": "^4.2.1",
    "karma": "^1.7.1",
    "karma-chrome-launcher": "^2.2.0",
    "karma-cli": "^1.0.1",
    "karma-coverage-istanbul-reporter": "^1.4.2",
    "karma-jasmine": "^1.1.1",
    "karma-jasmine-html-reporter": "^0.2.2",
    "karma-phantomjs-launcher": "^1.0.4",
    "protractor": "^5.4.1",
    "protractor-console-plugin": "^0.1.1",
    "stryker": "^0.6.1",
    "stryker-api": "^0.5.0",
    "stryker-html-reporter": "^0.4.1",
    "stryker-jasmine": "^0.2.1",
    "stryker-karma-runner": "^0.4.0",
    "truffle-contract": "^3.0.4",
    "ts-node": "^3.3.0",
    "tslint": "^5.11.0",
    "typescript": "^2.9.2"
  }
}


Karma.conf.js:

module.exports = function(config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine'],
    files: [
      "src/**/*.ts",
      "src/**/*.spec.ts",
      //"src/test.ts",
      //"src/environments/*.ts"
    ],
    //reporters: ['spec'],
    port: 9876,
    colors: true,
    logLevel: 'trace',
    autoWatch: true,
    browsers: ['Chrome'],
    singleRun: false,
    concurrency: Infinity,
  })
};

stryker.conf.js:

module.exports = function(config) {
  config.set({
    mutate: [
      "src/**/*.ts",
      "!src/**/*.spec.ts",
      "!src/test.ts",
      "!src/environments/*.ts"
    ],
    testFramework: 'jasmine',
    testRunner: 'karma',
    karmaConfigFile: 'karma.conf.js',
    reporter: ['progress', 'clear-text', 'dots', 'html', 'event-recorder'],
    coverageAnalysis: 'off',
    plugins: ['stryker-karma-runner', 'stryker-html-reporter']
  });
};

karma.conf.js

module.exports = function(config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine'],
    files: [
      "src/**/*.ts",
      "src/**/*.spec.ts",
      //"src/test.ts",
      //"src/environments/*.ts"
    ],
    //reporters: ['spec'],
    port: 9876,
    colors: true,
    logLevel: 'trace',
    autoWatch: true,
    browsers: ['Chrome'],
    singleRun: false,
    concurrency: Infinity,
  })
};

If you know another package for mutation testing that also would be good for me.