Bump htsjdk dependency version to 2.20.1.

Author: heuermh

pom.xml

@@ -30,7 +30,7 @@
     <bdg-formats.version>0.13.0</bdg-formats.version>
     <bdg-utils.version>0.2.15</bdg-utils.version>
     <grizzled-slf4j.version>1.3.3</grizzled-slf4j.version>
-    <htsjdk.version>2.19.0</htsjdk.version>
+    <htsjdk.version>2.20.1</htsjdk.version>
     <scoverage.plugin.version>1.1.1</scoverage.plugin.version>
   </properties>