LinearRegressionKit is now in version 0.7.4 and is now registered (you can use
add LinearRegressionKit from the package prompt). See LinearRegressionKit project page for details.
The package LinearRegression will not be updated anymore.
In version 0.7.4 the main change is the addition of the ridge regression (and weighted ridge expression). An example has been added to the documentation.
As usual, please share your view in the comments, or if you spot a problem, feel free to open an issue in the GitHub project.