Changes from Ant 1.10.2 TO Ant 1.10.3

Changes that could break older environments:

 * Previous versions of Ant's copy task would throw a BuildException
   if the "name" of the resource to copy was null. Starting
   this version, the copy task instead silently skips such resources
   and no longer throws an exception.
   ant-dev list

 * Reverted the signature change of various clone method
   implementation in Ant's data-types introduced with 1.10.2 as they
   broke subclasses of said data-types which tried to override clone.

Fixed bugs:

 * Fixed NullPointerException in ChainedMapper
   Bugzilla Report 62086

 * Fixed NullPointerException when a mappedresource is used in pathconvert
   Bugzilla Report 62076

 * Fixed an issue where a string, when used as a resource collection, within
   tokens, would be replaced by property values
   Bugzilla Report 62147

 * Added a workaround for a bug in the jarsigner tool to <verifyjar>
   which requires the -storepass command line argument when verifying
   signatures using -strict together with a PKCS12 keystore. Unlike
   when signing the jar it will not prompt for the keystore's password
   and read it from standard input.
   This means Ant will now pass the keystore's password on the command
   line when using <verifyjar>, which poses a security risk you should
   be aware of.
   Bugzilla Report 62194

Other changes:

 * Allow Saxon to be used for junitreport XSL transformation
   Github Pull Request #57

 * when running on Java 11+ rmic will fail early if iiop or idl are
   requested. Java11 removes support for CORBA and the switches have
   been removed from the rmic tool.

 * A new junitlauncher task which support JUnit 5 test framework.
   Bugzilla Report 61796