New upstream version 1.3

.github/workflows/maven.yml

.gitignore

.hg_archival.txt

.hgtags

.travis.yml

LICENSE.txt

README.md

pom.xml

...hms/stern_library/data_structure/DynamicIntervalTree.java

...and_algorithms/stern_library/data_structure/Interval.java

...stern_library/data_structure/OrderLinkedRedBlackTree.java

...algorithms/stern_library/data_structure/RedBlackTree.java

...thms/stern_library/data_structure/StaticIntervalTree.java

..._algorithms/stern_library/data_structure/ThriftyList.java

...hms/stern_library/geometry/ClosestPointPairAlgorithm.java

...rithms/stern_library/optimization/HungarianAlgorithm.java

...hms/stern_library/string/DamerauLevenshteinAlgorithm.java

...ithms/stern_library/string/KnuthMorrisPrattAlgorithm.java

src/main/java/org/xmlcml/args/ArgIterator.java-old

src/main/java/org/xmlcml/args/ArgumentOption.java-old