add support for typescript-style docstrings

this change adds [jsdoc-ts-utils](https://npm.im/jsdoc-ts-utils), which I have had success using in [mrca](https://npm.im/mrca). it allows us to use the `import()` syntax to reference types in other modules, and other things that make working in a TS-language-server-enabled editor much nicer. it does not support _all_ of the stuff TS does, but at least helps. this should not change the API documentation output (at least until we start using the new supported features) Signed-off-by: Christopher Hiller <boneskull@boneskull.com>

Author: boneskull

jsdoc.conf.json

@@ -15,7 +15,7 @@
  "tutorials": "docs/api-tutorials",
  "verbose": true
  },
- "plugins": ["plugins/markdown"],
+ "plugins": ["./node_modules/jsdoc-ts-utils", "plugins/markdown"],
  "source": {
  "include": ["lib/", "./docs/API.md", "bin"]
  },