Update build script to build ARM64 version on Apple Silicon machines (#…

…1918)

* $ Refactor build script

* * Update build script to build ARM64 on Apple Silicon

_scripts/build.js

@@ -7,13 +7,22 @@ const { name, productName } = require('../package.json')
 const args = process.argv
 
 let targets
-var platform = os.platform()
+const platform = os.platform()
+const cpus = os.cpus()
 
-if (platform == 'darwin') {
-  targets = Platform.MAC.createTarget()
-} else if (platform == 'win32') {
+if (platform === 'darwin') {
+  let arch = Arch.x64
+
+// Macbook Air 2020 with M1 = 'Apple M1'
+  // Macbook Pro 2021 with M1 Pro = 'Apple M1 Pro'
+  if (cpus[0].model.startsWith('Apple')) {
+    arch = Arch.arm64
+  }
+
+  targets = Platform.MAC.createTarget(['dmg'], arch)
+} else if (platform === 'win32') {
   targets = Platform.WINDOWS.createTarget()
-} else if (platform == 'linux') {
+} else if (platform === 'linux') {
   let arch = Arch.x64
 
   if (args[2] === 'arm64') {