v0.1.0

• Will create an IntersectionObserver instance per component.
• Added option to modify IntersectionObserver parameters.
  IntersectionObserver options can be passed via the prop whenVisible.
• Add option to override wrapper element when using noWrapper.
  noWrapper prop now also accepts a string to use as the wrapper element. This can be used when the child element is not a div.
• Capture ref value in effects, closes #30.
• Updated return type of the component to JSX.Element.