v2.1.0

• Added maximumBreadth option to limit stringification at a specific object or array "width" (number of properties / values)
• Added maximumDepth option to limit stringification at a specific nesting depth
• Implemented the well formed stringify proposal that is now part of the spec
• Fixed maximum spacer length (10)
• Fixed TypeScript definition
• Fixed duplicated array replacer values serialized more than once