GLFW cannot find macOS Vulkan extensions
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* **What is the current behaviour?**
tvulkan example crashes with `failed to create surface` error

* **Please provide the steps to reproduce and if possible a minimal demo of the problem**

* **What is the expected behaviour?**
successfully run the example

* **Please tell us about your environment**

  - Version: 1.0.0
  - OS: macOS 11.6 Apple M1
  - Bindings: GLFW | Vulkan
  - Backend: C
  - Nim Version: 1.6.0
  - Compiler used: Clang

* **Other information** (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, docs.gl, documentation etc)

