message: Add anyhow for easy error printing in main
  While the northstar runtime uses thiserror and declares
  specific error the main is just a example wrapper around
  the lib and make use of anyhow for easy printing.
diff: @@ -14,6 +14,7 @@ name = "north"
  name = "north"
  [dependencies]
  +anyhow = "1.0.34"
  async-trait = { version = "0.1.36", optional = true }
  base64 = { version = "0.12.3", optional = true }
  bitflags = { version = "1.2.1", optional = true }
  