cli: add universal-apple-darwin platform

cli/src/create-npm-dir.ts

@@ -47,7 +47,10 @@ export class CreateNpmDirCommand extends Command {
         name: `${packageName}-${platformDetail.platformArchABI}`,
         version,
         os: [platformDetail.platform],
-        cpu: [platformDetail.arch],
+        cpu:
+          platformDetail.arch !== 'universal'
+            ? [platformDetail.arch]
+            : undefined,
         main: binaryFileName,
         files: [binaryFileName],
         ...pick(

cli/src/new/index.ts

@@ -45,6 +45,7 @@ const SupportedPlatforms: string[] = [
   'x86_64-unknown-freebsd',
   'i686-pc-windows-msvc',
   'armv7-linux-androideabi',
+  'universal-apple-darwin',
 ]
 
 export class NewProjectCommand extends Command {

cli/src/parse-triple.ts

@@ -13,6 +13,7 @@ type NodeJSArch =
   | 's390x'
   | 'x32'
   | 'x64'
+  | 'universal'
 
 const CpuToNodeArch: { [index: string]: NodeJSArch } = {
   x86_64: 'x64',