fix(TS): clean up code from index.d.ts (testing-library#131)

* clean up code from index.d.ts

- export all types from 'dom-testing-library'
- use getQueriesForElement to get all GetsAndQueries
- remove duplicate code

* remove wait and waitForElement

* remove non used import

* use consistent void return

* unmount returns boolean

fix(TS): update typings with dom-testing-library queries and export t…

…hem (testing-library#130)

feat(render): return baseElement from render (testing-library#127)

* fix(render) return baseElement from render

* Update README.md

* tests: improve portals tests

* Update render.js

* Update render.js

fix(TS): add JSDoc to typings of exported functions (testing-library#125

)

fix(cleanup): don't error out if the container is not in the body

feat(render): deprecate renderIntoDocument and make it the default (t…

…esting-library#118)

Closes testing-library#116

BREAKING CHANGE: `renderIntoDocument` replaces `render` and `Simulate` is no longer exported (use `fireEvent` instead).

fix(engines): update engines.node in package.json

Not a major version bump because the lib never worked with node 6 anyway.

Closes testing-library#110

fix(TS): export RenderResult interface (testing-library#113)

fix: add support for react portal elements (testing-library#107)

* fix: add support for react portal elements

* Update documentation to add react portal support

* Update index.js

* Update README.md

fix(TS): add missing prettyDOM export to typings file (testing-librar…

…y#109)

* exports `prettyDOM` from dom-testing-library in the
react-testing-library's typings file.