message: Add coverage dir to readme
diff: @@ -51,7 +51,7 @@ The individual commands orchestrate separate backend, frontend, and test steps a
  1. Build TypeDoc documentation: `npm run docs`
  2. Extract sample code from test directory (run automatically as a *pre* step by the TypeDoc build command above): `npm run extract`
  3. Run lint rules against entire source tree: `npm run lint`
  -4. Run code coverage for the frontend, backend and common folders using the tests: `npm run cover`
  +4. Run code coverage for the frontend, backend and common folders using the tests (coverage output to source/test/lib/coverage) : `npm run cover`
  The full list of npm scripts can be found in the root `package.json` file.
  