Add support to React 16 at package.json

Fixed:

• Added React 16 as a supported version of the lib @jamesplease

Change the way the module is exported

Exporting using "module" package.json field may break in some cases (including default create-react-app setup), so we decided to remove it and use the default "main" field.

Improve error handling and documentations

Huge thanks to @dudko, our new maintainer!

Changes:

• Improve documentation and usage examples, by @dudko
• Better error handling and katex update, by @dudko

Add error handling

• Added parsing error handling with a renderError prop (#9)

Update Katex to 0.7

v1.1.0

Update katex and bump minor version (#5)

Modernize tooling and source

v1.0.1

Fix external path for React

Allow server-side rendering

v0.3

Add .travis.yml

First release

v0.2

Add README