`sourceMap` warning from tsconfig.spec.json

[lem-onade]

Getting the following warning when running tests:

ts-jest[config] (WARN) Got `sourceMap: false` from tsconfig file "/Users/stijn/Documents/digita/solid-poc/packages/solid-poc-app/tsconfig.spec.json".
This will disable source map support in ts-jest 27. Please set `sourceMap: true` in your tsconfig file "/Users/stijn/Documents/digita/solid-poc/packages/solid-poc-app/tsconfig.spec.json" if you want to keep source map support on

tsconfig.spec.ts:

{
  "extends": "@digita-ai/typescript-config/tsconfig.spec.json",
  "compilerOptions": {
    "baseUrl": "./lib",
    "outDir": "./dist",
    "module": "commonjs"
  },
  "files": [ "tests/setup.ts" ],
  "include": [ "lib" ],
  "exclude": [
      "dist",
      "node_modules"
  ]
}