feat(iframe): add support for sending messages from parent iframe to child
chore(iframes): ensure sendMessage only runs for the current widget
refactor(syndication): extract modal code
refactor(wants widget) load the want for the user if it already exists
fix(tests) fix unit tests)
fix(tests) increase code coverage
refactor(wants widget) remove function only used once
chore(node): try node version 11
chore(node): revert to node 10
refactor(wants widget) create a want upon clicking the want button
Merge branch 'features/NOW-408' of https://github.com/lithiumtech/li-widgets into features/NOW-408
refactor(wants) move creating wants button element to wants-syndicate; fix loading want in wants widget; display text for wants button based on whether want exists;
refactor(element-syndicate): add some basic element functions
Merge pull request #136 from lithiumtech/features/NOW-408

Features/now 408