Add label to TestsSymbol

Merge pull request #7 from functionalland/feature/types

Fix bug with components that don't have an initial callback function

Merge pull request #6 from functionalland/feature/types

Fix bug with components that don't have an initial callback function

Merge pull request #4 from functionalland/feature/types

Fix all types and update tests

Merge pull request #3 from functionalland/feature/types

Fix types and unify component.ts

Merge pull request #2 from functionalland/feature/types

Improve test runner on browser

Merge pull request #1 from functionalland/feature/types

Add types and update tests