fix(scrapebp): typo in event name
feat(scrapebp): add dumpBody and dumpHeader options
feat(main): encoding support

add deps: iconv-lite, charset
update README.md and test app
use latest for all deps

 Changes to be committed:
	modified:   README.md
	modified:   bin/scrapebp
	modified:   lib/main.js
	modified:   package.json