Fix the C++ version

Author: msujew

electron/build/template-package.json

@@ -20,8 +20,8 @@
   "scripts": {
     "build": "yarn download:plugins && theia build --mode development && yarn patch",
     "build:publish": "yarn download:plugins && theia build --mode production && yarn patch",
-    "package": "cross-env DEBUG=* && electron-builder --publish=never",
-    "package:publish": "cross-env DEBUG=* && electron-builder --publish=always",
+    "package": "cross-env DEBUG=* && electron-builder --publish=never -std=c++14",
+    "package:publish": "cross-env DEBUG=* && electron-builder --publish=always  -std=c++14",
     "download:plugins": "theia download:plugins",
     "patch": "ncp ./patch/main.js ./src-gen/backend/main.js"
   },

electron/packager/index.js

@@ -103,7 +103,7 @@
     //-------------------------------------------------------------------------------------------------+
     // Rebuild the extension with the copied `yarn.lock`. It is a must to use the same Theia versions. |
     //-------------------------------------------------------------------------------------------------+
-    exec(`yarn --ignore-engines --network-timeout 1000000 --cwd ${path('..', workingCopy)} -std=c++17`, `Building the ${productName} application`);
+    exec(`yarn --ignore-engines --network-timeout 1000000 --cwd ${path('..', workingCopy)}`, `Building the ${productName} application`);
 
     //-------------------------------------------------------------------------------------------------------------------------+
     // Test the application. With this approach, we cannot publish test results to GH Actions but save 6-10 minutes per builds |
@@ -176,8 +176,8 @@ ${fs.readFileSync(path('..', 'build', 'package.json')).toString()}
     //-------------------------------------------------------------------------------------------+
     // Install all private and public dependencies for the electron application and build Theia. |
     //-------------------------------------------------------------------------------------------+
-    exec(`yarn --ignore-engines --network-timeout 1000000 --cwd ${path('..', 'build')} -std=c++17`, 'Installing dependencies');
-    exec(`yarn --ignore-engines --network-timeout 1000000 --cwd ${path('..', 'build')} build${isElectronPublish ? ':publish' : ''} -std=c++17`, `Building the ${productName} application`);
+    exec(`yarn --ignore-engines --network-timeout 1000000 --cwd ${path('..', 'build')}`, 'Installing dependencies');
+    exec(`yarn --ignore-engines --network-timeout 1000000 --cwd ${path('..', 'build')} build${isElectronPublish ? ':publish' : ''}`, `Building the ${productName} application`);
 
     //------------------------------------------------------------------------------+
     // Create a throw away dotenv file which we use to feed the builder with input. |