TiagoOlivoto/metan: metan 1.14.0

Minor improvements

• Fix bug in get_model_data() calling objects of class mgidi with what = "PCA".
• Fix bug in path_coeff() when generating sequences of direct effects depending on the constant added to the diagonal of correlation matrix.
• Improve output of gmd() for gge objects.
• New option projection in gmd() for gge objects to get the projection of each genotype in the AEC coordinates.
• Fix bug when using mtsi() with an object of class waas.