STYLE: Prefer c++11 'using' to 'typedef'

The check converts the usage of typedef with using keyword.

cd ${BLDDIR}
run-clang-tidy.py -extra-arg=-D__clang__ -checks=-*,modernize-use-using  -header-filter=.* -fix
# https://clang.llvm.org/extra/clang-tidy/checks/modernize-use-using.html