Bump version to 0.6.0

Change-Id: I7fcabc189f1f841d59e330b0a1f66846f42f5823
diff --git a/script/conllu2korapxml b/script/conllu2korapxml
index 15e396c..60d691a 100755
--- a/script/conllu2korapxml
+++ b/script/conllu2korapxml
@@ -14,7 +14,7 @@
 my %opts;
 my %processedFilenames;
 
-our $VERSION = '0.5.0';
+our $VERSION = '0.6.0';
 our $VERSION_MSG = "\nconllu2korapxml - v$VERSION\n";
 
 use constant {