Take over platform/arch detection for more accuracy (#45)

namely for Apple Silicon ARM64 detection on macOS

lib/install.js

@@ -7,6 +7,6 @@ const bin = require('.');
     await bin.run(['version']);
     console.log('✔ Hugo installed successfully!');
   } catch (error) {
-    console.error('✖ ERROR: Hugo installation failed. :(\n', error);
+    console.error('✖ ERROR: Hugo installation failed. :( Are you sure this platform is supported?\n', error);
   }
 })();