Remove unused Result::Mutation#index field
Simplify worker internals
Fix YARD tag of return type
Fix progressive report slowdown
Fix wording in comment
Put isolation pipes into binmode
Specify the propagation of exception messages from fork isolation
Fix fork isolation specs to cover cases where no waitpid call can happen
Prepare version 0.7.3
Fix markdown in Changelog
Move parallel into internal library
Adjust reek settings
Add rspec metadata flag to blacklist an example group from mutation testing
[WIP] Implement line tracing for spec selection