Publish version 0.6.0+1

[matei-tm]

Publish checklist

• Update the src/pubspec.yaml with the required version
• Update the changelog
• Update documentation
  • README.md (+version sync)
  • src/README.md (+version sync)
  • example/README.md
• Format the code
  • in src dartfmt -w --fix src
  • in example dartfmt -w --fix example
• Run tests
  • cd src
  • pub run test
  • cd ..
  • cd example
  • flutter test
  • flutter drive --target=test_driver/app.dart
  • cd ..
• Commit with message #xxxx. Publish review completed
• Merge develop changes into master
  • Check CI results
• Dry run
  • cd src
  • pub publish --dry-run
• Publish pub publish
• Commit empty git commit --allow-empty -m "Completed publish closes #xxxx."