Move to new context API

Fixes

• Use new context API. #37 By (@kaushiknishchay)
• Removed usage of propTypes library. As Metatag is only a wrapper component. #37
• Uniquely identify any elements inside MetaTags by ids. Related to #35. Fixes #34

Breaking

• Upgraded peer dependency for react and react-dom to 16+ from 15.

Fixed client rendering issues

• Merged #26, Added null check for children.
• Fixed metatags not updating on client side when MetaTag content updates. Issue produced on 0.7.1.

Added getTags method on MetaTagsServer

• Added getTags method on MetaTagsServer, which returns React elements instead of string.
• Code refactor of server utils to remove duplicate.
• Change deserver port to 9010 for examples webpack dev server

Bundling improvement

• Upgraded to babel 7
• Upgraded to webpack 4
• Use rollup to create smaller bundle
• Removed babel-runtime

Notes from > v0.4.0

• Fixed #5, Duplicate title and meta tags
• Added itemProp attribute to uniquely identify meta tag

Use babel transform runtime, and canonical URL fix

• Fixed canonical URL duplicate #12
• Use babel transform runtime so build size is smaller

Remove duplicate meta tags

• Remove duplicate meta tags. Fixed #1, #3 . See https://github.com/s-yadav/react-meta-tags#meta-tag-uniqueness for details.
• Code refactor.
• Added cross-env to run dev

0.2.0: - Support react 16.

• Support react 16.
• Separated prop-types from react package
• Only transpile src to lib. Avoid creating bundle. This will reduce app bundle size.
• Fixed example to run on dev env (Webpack configuration needs to be fixed)