Support new type annotations

This release adds support for this-type-annotations (#55), typeof-type-annotations (#56) and string-literal-type-annotations (#59).

Commits

5317f2d Bump version for v0.6.2 release
f3ec45c Add support for string literal types (#59)
311c596 Update eslint version
e1cf073 Merge pull request #56 from YoloDev/feature-typeof-annotation
953a964 Merge pull request #55 from YoloDev/feature-this-type-annotation
d45e5f9 Update README.md
d31602b Merge pull request #57 from waffle-iron/master
fca2677 add waffle.io badge
a658b75 Add support for typeof type annotations
ce43d28 Add support for this type-annotations