Block.io NodeJS Library v1.0.6

Significant changes for v1.0.6:

• add new address archival api endpoints:
  • archive_address
  • unarchive_address
  • get_my_archived_addresses
• update bigi dependency to 1.4.0
• update bitcoinjs-lib dependency to 1.4.3
• update pbkdf2-sha256 dependency to 1.1.0
• update request dependency to 2.51.0