Contract Artifact Version

version = 1

Add sourceMap, structs, file, version field

version = 2

Add alias field

version = 3

remove finalType

version = 4

add buildType field

version = 5

add hex field

version = 6

add generics field

version = 7

add stateProps field
remove state field in ParamEntity

version = 8

add library field
remove generics field

version = 9

add sourceMapFile field
remove sourceMap field
remove sources field
remove asm field

The minimum version number currently supported: 8