build: fix global npm install

appveyor-bake.yml

@@ -68,7 +68,7 @@ build_script:
   - ps: $env:PATH="$pwd\depot_tools;$env:PATH"
   - update_depot_tools.bat
   # Uncomment the following line if windows deps change
-  # - src\electron\script\setup-win-for-dev.bat
+  - src\electron\script\setup-win-for-dev.bat
   - >-
       gclient config
       --name "src\electron"

script/setup-win-for-dev.bat

@@ -61,6 +61,7 @@ choco install -y python2 git yarn
 choco install python --version 3.7.9
 call C:\ProgramData\chocolatey\bin\RefreshEnv.cmd
 SET PATH=C:\Python27\;C:\Python27\Scripts;C:\Python39\;C:\Python39\Scripts;%PATH%
+npm install npm -g
 
 REM Setup Depot Tools
 git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git C:\depot_tools