update 69.1 (2021-04-08) to 70.1 (2021-10-27)
ICU 70 updates to Unicode 14, including new characters, scripts, emoji,
and corresponding API constants. ICU 70 adds support for emoji
properties of strings. It also updates to CLDR 40 locale data with many
additions and corrections. ICU 70 also includes many other bug fixes and
enhancements, especially for measurement unit formatting, and it can now
be built and used with C++20 compilers.
For details, please see https://icu.unicode.org/download/70.
Version 1.9.4 changed default build options so that the
shared library is built by default which breaks addons linking
against it.
Explicitly set the build options so that only the static library
is built, as before the bump.
Signed-off-by: Matthias Reichl <hias@horus.com>
