Getting ICU_VERSION in setup.py doesn't work on Ubuntu 19.04 with installed libicu-dev and pkg-config

Created by: MrYoda

icu-config command was disappeared from new Debian/UBuntu ICU dev packages (e.g. 19.04). I think there is icuinfo command instead of old icu-config and it returns XML now. Also, nested try-except block in setup.py doesn't work too - it try not to execute pkg-config after exception in icu-config executing block.