chore: bump version to 0.3.0 (#125)

Author: ZENOTME

datasketches/Cargo.toml

@@ -17,7 +17,7 @@
 
 [package]
 name = "datasketches"
-version = "0.2.0"
+version = "0.3.0"
 
 edition.workspace = true
 homepage.workspace = true