add windows dependency: mingw-w64-x86_64-icu

README.md

@@ -238,13 +238,13 @@ For example, [monero-java](https://github.com/woodser/monero-java) compiles this
     For 64 bit:
 
      ```
-     pacman -S mingw-w64-x86_64-toolchain make mingw-w64-x86_64-cmake mingw-w64-x86_64-boost mingw-w64-x86_64-openssl mingw-w64-x86_64-zeromq mingw-w64-x86_64-libsodium mingw-w64-x86_64-hidapi mingw-w64-x86_64-unbound mingw-w64-x86_64-protobuf git mingw-w64-x86_64-libusb gettext base-devel
+     pacman -S mingw-w64-x86_64-toolchain make mingw-w64-x86_64-cmake mingw-w64-x86_64-boost mingw-w64-x86_64-openssl mingw-w64-x86_64-zeromq mingw-w64-x86_64-libsodium mingw-w64-x86_64-hidapi mingw-w64-x86_64-unbound mingw-w64-x86_64-protobuf git mingw-w64-x86_64-libusb gettext base-devel mingw-w64-x86_64-icu
      ```
 
      For 32 bit:
 
      ```
-     pacman -S  mingw-w64-i686-toolchain make mingw-w64-i686-cmake mingw-w64-i686-boost mingw-w64-i686-openssl mingw-w64-i686-zeromq mingw-w64-i686-libsodium mingw-w64-i686-hidapi mingw-w64-i686-unbound mingw-w64-i686-protobuf git mingw-w64-i686-libusb gettext base-devel
+     pacman -S  mingw-w64-i686-toolchain make mingw-w64-i686-cmake mingw-w64-i686-boost mingw-w64-i686-openssl mingw-w64-i686-zeromq mingw-w64-i686-libsodium mingw-w64-i686-hidapi mingw-w64-i686-unbound mingw-w64-i686-protobuf git mingw-w64-i686-libusb gettext base-devel mingw-w64-i686-icu
      ```
 5. Clone repo if installing standalone (skip if building as part of another repo like monero-java or monero-ts): `git clone --recursive https://github.com/woodser/monero-cpp.git`
 6. Update submodules: `cd monero-cpp && ./bin/update_submodules.sh`