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.

fix(TS): add debug() to typings (testing-library#90)

* Add debug() to typings

* Update contributors

fix(TS): remove unused import to prevent naming conflict with export (t…

…esting-library#89)

fix(TS): Add missing getAll and queryAll functions to TS definitions (t…

…esting-library#88)

feat(debug): add a debug convenience method (testing-library#87)

Also adds @Gpx to contributors!

Closes testing-library#86

fix(TS): type literal property cannot have an initializer (testing-li…

…brary#82)

A type literal property cannot have an initializer. The runtime code
should take care of initialize the value.

fix(TS): examples + types (testing-library#77)

* Update README with new match examples

* Update types

(probably invalid typescript syntax)

* Remove example that messes up TOC

* Fix union type