v1.0.0-beta.4

Breaking Changes

• Remove -e from CLI args and use NODE_ENV for controlling the
  environment #318

Features

• Add new screenshots options - on|off|only-on-failure to manage capturing
  the step screenshots #311
• Enable screenshot deduplication feature by default when the agent is invoked
  via Heartbeat #322

Bug fixes

• Avoid creating duplicate screenshot JSON docs for each journey
  #320
• Associate beforeAll hook errors across all journeys
  #316
• Provide journey isolation via context #314