Add type file, Support nested files, / index routes, and trailing ? query strings

[wallzero]

• Add type file so middleware can be used in TypeScript projects
• Switch to glob to retrieve all nested files within directory
• If request is a trailing /, and that route has a compressed index.html, serve it. Important: Doesn't serve if no compressed `index.html is found
• Strip trailing ? query strings. Query strings are sometimes used for caching but previous code confused them when detecting mime type. I'm unsure if there is a use case where the query string should be preserved but it's captured and kept for now.
• Ignore package-lock.json
• Remove $ from example; results in no matches

[wallzero]

Hey, just wondering if this can get merged. Thanks!

[wallzero]

Take another look. I also think my changes cover issue #3.