Depend on preview9
JSON support Closes npgsql#981
Testing GitHub releases via AZP
Port to 3.0.0-preview7 (npgsql#943) Includes the new upstream query pipeline EFCore.PG.NTS is currently disabled
Merge branch 'hotfix/2.2.4'
Merge pull request npgsql#880 from roji/preview5 Port to 3.0.0-preview5
Merge branch 'preview4' into dev
Merge pull request npgsql#844 from roji/preview3 Sync with EF Core 3.0.0 preview3
Bump version to 3.0.0