CI: Make appveyor cache more efficient by depending on package-lock.json.

Also actually build win32 packages.

appveyor.yml

@@ -60,9 +60,9 @@ install:
         sudo apt-get install -qq -y libxml2-dev libappindicator1 rpm;
 
 cache:
-  - '%APPDATA%\npm-cache'
-  - '%USERPROFILE%\.electron'
-  - node_modules
+  - '%APPDATA%\npm-cache' -> package-lock.json
+  - '%USERPROFILE%\.electron' -> package-lock.json
+  - node_modules -> package-lock.json
 before_build:
   - ps: >-
         ${env:CURRENT_BRANCH} = If (${env:APPVEYOR_PULL_REQUEST_HEAD_REPO_BRANCH}) {
@@ -78,7 +78,7 @@ build_script:
         npm --version
 
         If ($isWindows) {
-          npm run setup:win64
+          npm run setup:win
         } ElseIf ($isLinux) {
           npm run setup:linux
         }