v0.9.0

• Adding the phonetics/alpha-sis namespace.
• Adding the phonetics/fuzzy-soundex namespace.
• Adding the phonetics/phonex namespace.
• Adding the stemmers/uea-lite namespace.
• Adding the stats/inferential#sampleCovariance function.
• Adding the stats/inferential#sampleCorrelation function.
• Moving the metrics namespace to metrics/distance.