Depend on sqlite-utils>=3.30

Decided to use the most recent version in case I decide later to
use the flatten() utility function.

Refs #1850

setup.py

@@ -57,6 +57,7 @@ def get_version():
         "PyYAML>=5.3",
         "mergedeep>=1.1.1",
         "itsdangerous>=1.1",
+        "sqlite-utils>=3.30",
     ],
     entry_points="""
         [console_scripts]