Update configuration

Update .travis.yml to run @relative-ci/agent after the build is done.

script:
  - npm run build --json webpack-stats.json
  - npx relative-ci-agent

Run from the project root directory

Since @relative-ci/agent@v4.1.0, you can run the CLI from the project root directory using --config-dir / -c argument:

npx relative-ci-agent --config-dir packages/components