Support Yubikey 4 series

See #6

fix args

v0.3.6

fix: device id must be first

fix serial assignment

v0.3.5

fix: serial assignment

hasAccount & fix password retrieval

v0.3.4

feat: hasAccount & fix password return

IsAvailable

Publish IsAvailable with documentation.

Fix the logic of isAvailable (undocumented)

v0.3.1

fix: isAvailable logic

IsAvailable (undocumented)

Merge pull request #5 from aripalo/is-available

feat: IsAvailable

IsPasswordProtected

Publish IsPasswordProtected

IsPasswordProtected

Publish IsPasswordProtected method as "undocumented" feature.

Initial release

v0.1.0

feat: use stdin for password as it fill fail faster when empty string…