0.5.6: Bug FixLint

Breaking

• None.

Enhancements

• Improve performance by reducing calls to SourceKit.
  Norio Nomura

Bug Fixes

• Fix homebrew deployment issues.
  Norio Nomura
• AutoCorrect for TrailingNewlineRule only removes at most one line.
  John Estropia
• valid_docs did not detect tuple as return value.
  Norio Nomura
  #324
• Escape strings when using CSV reporter.
  JP Simard