Stable build v3.2.0

1. add support for deno and bun plus tests
   -- fix: issue #68 and #396
   -- add node:protocol to make them explicit when running in env other than node, including deno and bun
2. moved root pdfparser source and types to ./src and ./src/types respectively ---- double check your import path please, all exports from ./dist now
3. reduce distributed package size to 2.1mb, improve pack and build
4. feat: enable reading multiple pdf files with a single PDFParser object, credit @nicolabaesso
5. other chores, including tests, jest upgrade, readme update, etc.