villagesql-statistics

Packages the upstream vsql-statistics extension (statistical aggregates
and tests (IQR, t-test, mode, skewness, kurtosis, ANOVA, ...) returned as
JSON, by Ronald Bradford) as a separate snap that plugs into the
villagesql snap through the content interface:

sudo snap install villagesql-statistics
sudo snap connect villagesql:extensions villagesql-statistics:extensions
sudo snap restart villagesql
sudo villagesql.mysql -uroot -e "INSTALL EXTENSION vsql_statistics;"

The upstream tag is v.0.3; the bundle's manifest says 0.5.0 and the snap
version follows the manifest.