update electron to v43

electron/node_modules/@electron/windows-sign/dist/cjs/spawn.d.ts

@@ -0,0 +1,16 @@
+/// <reference types="node" />
+import { SpawnOptions } from 'child_process';
+export interface SpawnPromiseResult {
+    stdout: string;
+    stderr: string;
+    code: number;
+}
+/**
+ * Spawn a process as a promise
+ *
+ * @param {string} name
+ * @param {Array<string>} args
+ * @param {SpawnOptions} [options]
+ * @returns {Promise<SpawnPromiseResult>}
+ */
+export declare function spawnPromise(name: string, args: Array<string>, options?: SpawnOptions): Promise<SpawnPromiseResult>;