build: Add support for x86 macOS 10.15 and ARM64 macOS 11.0 (#2607)

This PR drops the use of brew for dependency management in favor of
macports so we can support lower macOS versions instead of just the
lowest one supported by Apple

Closes #2586

dist/web/source/wasm-config.js

@@ -166,7 +166,7 @@ var Module = {
             if (status == 1) {
                 GLFW.active.buttons |= (1 << eventButton);
                 try {
-                    event.target.setCapture();
+                    event.target.setPointerCapture(event.pointerId);
                 } catch (e) {}
             } else {
                 GLFW.active.buttons &= ~(1 << eventButton);