Fix appveyor install script

appveyor.yml

@@ -19,7 +19,7 @@ image: Visual Studio 2015
 #   - ps: $blockRdp = $true; iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/appveyor/ci/master/scripts/enable-rdp.ps1'))
 install:
   - ps: Install-Product node $env:nodejs_version x64
-  - ps: npm ci -g [email protected]
+  - ps: npm install -g [email protected]
   - set PATH=%programfiles(x86)%\\Microsoft SDKs\TypeScript\2.4;%PATH%
 
   - appveyor DownloadFile https://github.com/fttx/barcode-to-pc-server/blob/master/electron/electron-resources/Bonjour64.msi?raw=true
@@ -37,9 +37,9 @@ install:
 
   - curl -fsSL -o C:\Certificates.p12 %CERTIFICATE_DOWNLOAD%
   - npm cache verify
-  - npm install --unsafe-perm
+  - npm ci --unsafe-perm
   - cd ionic
-  - npm install --unsafe-perm
+  - npm ci --unsafe-perm
   - cd ..
   - set NODE_ENV=production
   # - set PATH=%APPDATA%\npm;%PATH%