Update react-onclickoutside dependency and create the CalendarContainer

[arqex]

Description

Bring up to date the react-onclickoutside dependency. Since the newer versions of react-onclickoutside the library is shipped as a higher order component, the old code in react-datetime for adapting the clicking outside to different versions of react is not valid anymore. In its place, there is a new component wrapped by the react-onclickoutside HOC called CalendarContainer.

Now CalendarContainer component is the one that renders calendar the views, but the view to render is still defined by DateTime.

Motivation and Context

Old version of react-onclickoutside was creating conflict for projects using the branch 5.x of the same library.

Checklist

• I have added tests covering my changes
• All new and existing tests pass
• My changes required the documentation to be updated
  [ ] I have updated the documentation accordingly
  [ ] I have updated the TypeScript 1.8 type definitions accordingly
  [ ] I have updated the TypeScript 2.0+ type definitions accordingly