Refactor electron launcher

Don't try auto-update on portable builds

src/buildOptions.ts

@@ -0,0 +1,13 @@
+import * as fs from 'fs'
+import * as path from 'path'
+import { BuildInfo } from 'electron-telemetry/build/Model'
+
+let buildOptions: BuildInfo = ({ platform: process.platform, package: 'unpacked' } as any)
+try {
+  const options = JSON.parse(fs.readFileSync(path.join(__dirname, '..', '..', 'buildOptions.json')).toString())
+  if (typeof options.platform === 'string' && typeof options.package === 'string') {
+    buildOptions = options
+  }
+} catch (loadingBuildOptionsMayFail) {}
+
+export default buildOptions