v0.4.0

This minor release adds more CVIs and improvements, such as:

• The (Renyi's) representative Cross Information Potential (rCIP) CVI.
• The Partition Separation (PS) CVI.
• Increased test coverage to 100%.
• Percentage error in testing to verify the numerical results of each CVI for consistency.
• Programmatic tracking of docs build settings at readthedocs.

What's Changed

• Convert cvi test to percentage difference by @AP6YC in #54
• Feature/coverage passes by @AP6YC in #57
• Feature/r cip by @AP6YC in #58
• Feature/rtd file by @AP6YC in #60
• Feature/ps by @AP6YC in #61
• Release/v0.4.0 by @AP6YC in #62

Full Changelog: v0.3.0...v0.4.0