[BUG] OpenSSL not found on archlinux during build

[anghenfil]

What were you doing?
I tried to build ultraschall using the build.sh on archlinux.

What happened?
CMake Error at /usr/share/cmake-3.20/Modules/FindPackageHandleStandardArgs.cmake:230 (message): Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the system variable OPENSSL_ROOT_DIR (missing: OPENSSL_CRYPTO_LIBRARY) (found version "1.1.1k")
openssl is installed, I tried to set OPENSSL_ROOT_DIR as environment variable to all possible locations (including /usr/lib and /usr/lib/openssl-1.0/).

Version of Ultraschall
Last commit in this repo.

Operating system and language running Ultraschall
Linux version 5.11.16-arch1-1, cmake version 3.20.2

[nethad]

@anghenfil You might want to check out my PR here: Ultraschall/ultraschall-plugin#18