higher dimensions

Would you consider supporting dimensions beyond 4D, specifically 5D and 6D?

For me this would simplify use-cases for looping / tiling animations such as #29 which can be implemented by using two of the dimensions to sample along a circle.

Start by reviewing the existing simplex-noise.js dimensional API and the looping or tiling animation use case described in issue #29. Define the expected 5D and 6D interfaces and behavior first; the work is complete when both dimensions are supported and their behavior is covered by appropriate tests.

Written by the indexing model from the issue text.