arbiter-core-v0.7.0

Fixed

• fix data output test to rmdir after completion
• fix clippy + fmt
• fix tests

Other

• Merge pull request #656 from primitivefinance/colin/fix-event-logger
• rm printlns
• fmt
• create valid json
• Update data_collection.rs
• wip
• push json logs to vec
• it works!!!!!!!!!!!!
• wip
• unsafe transmute
• Update data_collection.rs
• broadcast enum
• create a channel for direct reads
• (deps) bump tracing from 0.1.39 to 0.1.40