Add HTML, CSS, GraphQL, SQL template tags

[bennypowers]

Brings language-typescript in line with language-javascript.

See https://github.com/atom/language-javascript/pull/638/files

Requirements

• Filling out the template is required. Any pull request that does not include enough information to be reviewed in a timely manner may be closed at the maintainers' discretion.
• All new code requires tests to ensure against regressions

Description of the Change

Adds html, css, sql, gql, and graphql template tags to to the parser.

Alternate Designs

don't highlight those templates

Benefits

Users can work with embedded languages

Possible Drawbacks

possible performance concerns?

Applicable Issues

[bennypowers]

This may also need work in grammars/typescript.json, I'm not sure

[bennypowers]

closing as irrelevant, what I thought was lack of support for html tags actually appears to be a bug related to static readonly field = foo syntax