* [hellojs] Add/modify tests for latest version
* [hellojs] Update definition to latest version
Modify interfaces to reflect version 1.15.1 codebase.
Add definition for hello.util.
Simplify thenable definition.
* [hellojs] Add missing method definition
Include api() definition when calling with options object.
* [hellojs] Add tslint.json and fix linting errors
* [hellojs] Use TypeScript 2.3
Set TypeScript version to 2.3 to avoid errors with object-type.
* [hellojs] Switch to PromiseLike
https://github.com/DefinitelyTyped/DefinitelyTyped/issues/17251
* [hellojs] Remove unused interface
* [hellojs] Rename namespace and add export
Add default export for static hello-object.
Rename namespace to hello so that the namespace as well as the hello-object will be exported.
* [hellojs] Remove redundant 'export' keyword
