Declare project's version in build.gradle file.
Change project's version to SNAPSHOT.
Move test data classes to package dolly.data.
Add new data classes for testing: ClassLevelCopyableCloneable and PropertyLevelCopyableCloneable.
Add static properties to data classes.
Test ClassLevelCopyableCloneable class in ClonerTest.
Remove casing for assigning methods Cloner.clone() and Copier.copy() return values.
Test classes ClassLevelCopyableCloneable and PropertyLevelCopyableCloneable in ClonerTest.
Test classes ClassLevelCopyableCloneable and PropertyLevelCopyableCloneable in CopierTest.