Merge pull request #11 from hmcts/ctsct-15

CTSCT-15: yarn upgrade

Merge pull request #8 from hmcts/Paragraph-Class

Add govuk-body class to paragraphs

Fix production dependencies

Check that the chat container exists

Param to specify which GDS version to use by default

GDS3 style fix for confirm chat close button

Fix bugs with IE

Minor adjustments to GDS 3 styling

Let services use GDS 2 or 3

Add GDS govuk-link class to webchat link