Stable build v3.1.3

• eslint is configured and enabled
• typescript: configured and part of build
• typescript: updated pdfparser.d.ts with more types
• typescript: previous lib/p2jcmd*.js are replaced with src/cli/p2jcli*.ts
• maint: previous root/pdf2json.js is removed, favor bin/pdf2json.js
• tests: Jest test's Page content are validated with test/data/xxx.json
• error and exception handling: address the following issues and also added associated test PDFs:
  ** ENOENT: no such file or directory, open '/var/task/../package.json' #343
  ** Node.js Server got stuck when parsing specific PDF while it is working for other PDFs #321
  ** TypeError: Cannot read property 'free' of undefined #318
  ** parserError: 'bad XRef entry' #277
  ** params.get is not a function #262
  ** Error: Requesting object that isn't resolved yet #255