fix: do not use pnpm automatically

Author: egoist

lib/installPackages.js

@@ -15,10 +15,10 @@ function getNpmClient() {
     return cachedNpmClient
   }
 
-  if (spawn.sync('pnpm', ['--version']).status === 0) {
-    cachedNpmClient = 'pnpm'
-  } else if (spawn.sync('yarn', ['--version']).status === 0) {
+  if (spawn.sync('yarn', ['--version']).status === 0) {
     cachedNpmClient = 'yarn'
+  } else {
+    cachedNpmClient = 'npm'
   }
 
   return cachedNpmClient