v0.0.25

Changelog

• 45f8eda Add a stateless postgres describe table function (#106)
• e3f6eba Add a test for Fields.AddField (#104)
• 49c882e Add more colKindToDataType tests (#103)
• cb3c59d Consolidate postgres schema code (#105)
• 46933e9 Split up postgres column tests (#102)
• a3a1a3b Using Null metrics provider if none is available (#107)