0.51.8

• Fixed redundantSelf removing non-unwrapped weak self inside closures
• Fixed fileprivate rule making init private when inherited by subclass in the same file
• Fixed hoistPatternLet rule inserting let inside dictionary type literal
• Fixed indenting for chained members inside conditional compilation blocks
• Fixed unusedArguments incorrectly removing used argument after conditional compilation block
• Improved unusedArguments rule error handling