main: bump version to 0.2.1

Author: Thibault Wittemberg

Sources/XcodeCoverageConverter/main.swift

@@ -4,7 +4,7 @@ import Core
 struct Xcc: ParsableCommand {
     static let configuration = CommandConfiguration(
         abstract: "A Swift command-line tool to convert xccov outputs into continuous integration friendly formats",
-        version: "0.2.0",
+        version: "0.2.1",
         subcommands: [Generate.self],
         defaultSubcommand: Generate.self)