v2.0.0-rc1

Converted to TypeScript, with type definitions available.

Using ESNext-style modules (though still available as UMD)

Changed exports so that they are not available on the `Random` class,
but instead in a flat hierarchy.

Switched from jasmine to jest

Using rollup to package the build

Changed .travis.yml node versions

removed the optionalDependencies in package.json "benchmark" and "mic…

…rotime"

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