Update peerDependencies and tests to support the latest version of should 13.x.

Upgrade to the latest version of other dev dependencies: Reactjs, eslint, babel ...

Upgrade jsdom to latest to fix security vulnerability in nested dev dependency hapijs/hoek v4.2.0 Modification of Assumed-Immutable Data (MAID) vulnerability.

Breaking change is using the cheerio v1, null components are not present otherwise the reset of the API behaves the same.

Readme updated highlighting the issue with isPresent

New feature added to check if an input field has been disabled.

Note

Need to review breaking changes to:

• sinon
• react-element-to-jsx-string

• .prop(key, value) value now supports deepAssert for the likes of objects and arrays.
• updated dependencies

Assert on data attributes with .data(key, [value])

• New props(object) feature added, assert on multiple props on a component.
• Changes to attr, prop, state assertions if value argument is set to undefined then it will assert the props value. E.g. prop(key) === undefined rather than saying the prop is missing.

Check if wrapper is present.

Assert on form inputs: <input> <select> and <textarea> using new .value(string) feature.

text() and state(key,[value]) assertions add.