Minor Release: Performance optimization to minimize memory allocs on allocation of Set

What's Changed

• Utilizes map capacity hint in all constructors to minimize memory allocation churn with instantiation and population of Set - originally proposed by @fy0
• New *WithSize constructors: NewThreadUnsafeSetWithSize and NewSetWithSize to allow for minimizing allocation churn and unnecessary resizing of internal state.
• Adds a RemoveAll convenience method

Full Changelog

v2.2.0...v2.3.0