Disable installation of NPM package that requires compilation (#3196)

* prevent peer dependencies not to be installed automatically (new behavior in npm > 7.0)

* updated discord dependency

* changed flag, because discord-rpc 3.2.0 changed peer deps to opt deps

package.json

@@ -29,7 +29,7 @@
     "win-7zip": "latest"
   },
   "scripts": {
-    "postinstall": "cd src/app && npm install",
+    "postinstall": "cd src/app && npm install --no-optional",
     "start": "npm run start:dev",
     "start:dev": "electron . --update-url=DISABLED --cache-directory=./src/web --disable-http-cache",
     "start:build": "npm run build:web && electron . --update-url=DISABLED --cache-directory=./build/latest",

src/app/package.json

@@ -11,8 +11,8 @@
   "main": "main.js",
   "dependencies": {
     "@logtrine/logtrine": "latest",
+    "discord-rpc": "^3.2.0",
     "fs-extra": "latest",
-    "jszip": "latest",
-    "discord-rpc": "^3.1.1"
+    "jszip": "latest"
   }
 }