sqflite_common_ffi 2.0.0-nullsafety.3

sqflite ffi based implementation, for desktop and units tests.

2.0.0-nullsafety.3

• nnbd support
• Improved sqlite shared lib loading mechanism to support alternate library.

1.1.1

• Fixes hot-restart lock issue

1.1.0+1

• Use sqlite3 instead of moor_ffi

1.0.0+4

• Support extended result code exception

1.0.0+1

• Initial revision from sqflite_ffi_test experimentation