James-Thorson-NOAA/VAST: Improved EOF analysis, overlap metrics, and shapefile usage

VAST release 3.4.0 matches FishStatsUtils 2.6.0 and these include several improvements including: Improved options for Empirical Orthogonal Function analysis New options for calculating relationships among variables including overlap e.g., Schoeners-D Options to define extrapolation-area based on user-supplied shapefile