Move PropTypes from React package to prop-types

[mjclawar]

Description

This moves the PropTypes import from react to prop-types.

Example:

import React, { PropTypes } from 'react';

is now

import React from 'react';
import PropTypes from 'prop-types';

This will allow dash-core-components to support React 16+ by patching in different versions to the dash-renderer by the Dash developer (for now).

For example, in the application definition file:

import dash_renderer
dash_renderer._js_dist_dependencies = [
                {
                    'external_url': [
                        'https://unpkg.com/react@16/umd/react.production.min.js',
                        'https://unpkg.com/react-dom@16/umd/react-dom.production.min.js'
                    ],
                    'relative_package_path': [
                        'react.production.min.js',  # where the user has added this file to the installed dash-renderer for now
                        'react-dom.production.min.js'  # where the user has added this file to installed dash-renderer for now
                    ],
                    'namespace': 'dash_renderer'
                }
            ]

Changes

• Added package-lock.json
• Ran the https://github.com/reactjs/react-codemod#react-proptypes-to-prop-types PropTypes codemod from React organization
• Updated the version to 0.19.0

[chriddyp]

a few nit-picky things. I have the personal convention of using {Component} rather than { Component }

[chriddyp]

Also, my editor will automatically add new lines to the ends of files whereas it looks like yours removes them. Could we add these newlines back?

[chriddyp]

Otherwise the next time I make a PR, it'll have these superfluous diffs

[mjclawar]

Mind if I add a .editorconfig with a newline at the end of all files then?

[mjclawar]

I think this was the codemod that made all the style changes at the end of files.

[chriddyp]

Looks good to me here too. Once we change { Component } to {Component} and add the new lines back, I'll merge this

[mjclawar]

@chriddyp fixed the style mismatches. I added a .editorconfig file that makes sure the newline gets added to future files, but I can remove that if you prefer to avoid adding that file.

[chriddyp]

.editorconfig - very nice! didn't know about this