feat: Convert Buffer and node crypto to web apis (#11)

BREAKING CHANGE: exported functions are now async

chore: fix types

fix: use node-prefixed import for crypto (#7)

fix: reverse TOTP code (#5)

chore: fix release.yml

fix: do not export Buffer type

fix: set options.window to number

fix: add install instructions

fix: add epic-web logo

fix: add types