Revert to build GDevelop.js in AppVeyor to see if signing works better

appveyor.yml

@@ -7,7 +7,11 @@ pull_requests:
   do_not_increment_build_number: true
 image: Visual Studio 2019
 clone_depth: 5
-# Build must be triggered by the API.
+# Only build
+branches:
+  only:
+    - master
+    - /experimental-build.*/
 skip_tags: true # Don't rebuild on tags.
 init:
   - ps: Install-Product node 16
@@ -53,6 +57,23 @@ install:
 
       # $LogConfig | Set-Content -Path C:\projects\gdevelop\eSignerCKA/log4net.config
 
+  # Build GDevelop.js (and run tests to ensure it works).
+  # (in a subshell to avoid Emscripten polluting the Node.js and npm version for the rest of the build)
+  - cmd: >-
+      cd GDevelop.js
+
+      npm -v && npm install
+
+      git clone https://github.com/juj/emsdk.git
+
+      cd emsdk
+
+      emsdk install 3.1.21
+
+      CMD /C "emsdk activate 3.1.21 && cd .. && npm run build"
+
+      cd ..\..
+
   # Build GDevelop IDE.
   # Also install setuptools as something requires distutils in electron-app, and it was removed in Python 3.12.
   # setuptools will make distutils available again (but we should migrate our packages probably).