• Make model methods virtual (#121)
• More point extensions (#123)
  • Add Vector2 extensions so that it can be used instead of IntPoint
  • Add IntPointWithValue record
  • Add ChebyshevDistance(Point) and ChebyshevDistance(Vector2) (#124)
  • Support more chars in Move(char) methods

Full Changelog: v0.12.0...v0.13.0

Migrate to .NET 6 and drop .NET 5 support

Extensions:

• Add StopwatchExtensions

Extensions:

• Add String.ReverseString().
• Add String.RemoveBlanksAndMakeInvariant().
• Add String.IsPalindrome().
• Add String.ToBoolEnumerable().
• Add String.ToBitArray().
• Add BitArrayExtensions.Reverse().
• Add BitArrayExtensions.ToBitString().
• Add Dictionary.AddOrUpdate()
• Add Direction.Opposite().
• Fix Maths.GreatestCommonDivisor(IEnumerable<long>): missing this (it wasn't an extension method).

Models:

• Add BitMatrix.

• Add IntPoint record class.

• Add Point.RotateClockwise and Point.RotateCounterclockwise.

• Add HashSet<T> IntersectAll<T>(this IEnumerable<IEnumerable<T>>) .
• Add HashSet<char> IntersectAll(this IEnumerable<string>).

• Add a distance parameter to Point.Move() methods.
• Add DirectionExtensions:
  • TurnLeft().
  • TurnRight().
  • Turn180().

Add:

• enum Direction
• Point.Move(char)
• Point.Move(Direction)
• CharExtensions.GetDirection()

• Add string.IsWhiteSpace() extension
• Add GCD and LCM methods to a new static Maths class.

Convert SheepTools/Model classes into C#9 class records.