- relaxed the conditions for package images a bit - missing binary da…

…ta now returns null instead of throwing an exception

- lots of dependency updates

Fix for #63 - null values in FK field

Fixes in FilebasedResource to better support nontabular data.

Fix for a bug in FilebasedResource returning the format.

Smaller change

Merge remote-tracking branch 'origin/main'

# Conflicts:
#	pom.xml

Buf fix for data resources that should be serialized to file

small fix

Better support and tests for non-tabular resources

Better support and test for non-tabular resources. Added spotbugs mav…

…en plugin

Internal refactoring to how Resources are serialized/deserialized in …

…a Package.

Added getDataAsJson()/getDataAsCsv() methods to Resources so users are able to retrieve all data in a specified format in one go.