Bump tokenizer to v2.4.0 and our version to 2.7.0

Change-Id: Idb2b7cc7fb615d4e33c13b04fa569ab25166da87
diff --git a/script/tei2korapxml b/script/tei2korapxml
index 5855406..f5aaa95 100755
--- a/script/tei2korapxml
+++ b/script/tei2korapxml
@@ -25,7 +25,7 @@
 use KorAP::XML::TEI::Header;
 use KorAP::XML::TEI::Inline;
 
-our $VERSION = '2.6.2';
+our $VERSION = '2.7.0';
 
 our $VERSION_MSG = "\ntei2korapxml - v$VERSION\n";