I forgot that my build process automatically updates
copyright years when the current year changes.
My Travis CI unit tests verify that there are no local
changes after running all the tests.
That test failed because the update_copyrights.py changed
all the "2019-2020" to "2019-2021".
Decided to move call to makedoc script from run script.
It was confusing that it was hidden inside unit_test_js,
especially because it invokes the code generator for
all supported languages.
