macOS building from source: clang: error: invalid argument '-compatibility_version 0.8.0' only allowed with '-dynamiclib'

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### Description

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Hi, I'm trying to compile on MacOS as per your instructions, and `make` fails with the following error:



```

[ 99%] Building CXX object UI/frontend-plugins/streamfx/CMakeFiles/StreamFX.dir/source/gfx/shader/gfx-shader-param-matrix.cpp.o

[ 99%] Building CXX object UI/frontend-plugins/streamfx/CMakeFiles/StreamFX.dir/source/gfx/shader/gfx-shader-param-texture.cpp.o

[ 99%] Building CXX object UI/frontend-plugins/streamfx/CMakeFiles/StreamFX.dir/source/UYX5XTB5RZ/qrc_streamfx.cpp.o

[100%] Linking CXX shared module StreamFX.so

clang: error: invalid argument '-compatibility_version 0.8.0' only allowed with '-dynamiclib'

make[2]: *** [UI/frontend-plugins/streamfx/StreamFX.so] Error 1

make[1]: *** [UI/frontend-plugins/streamfx/CMakeFiles/StreamFX.dir/all] Error 2

```



I'm not sure if at all related to #229 as the errors are completely different, but it is suspicious that we seem to be having problems around similar system conditions. Let me know if I can provide any more info!



### System Information

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- Software Version: 0.8.0 (I think?)

- Operating System: MacOS 10.15.5 (Catalina)

- XCode: 11.5

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