update electron to v43

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

@@ -0,0 +1,13 @@
+import { SignOptions } from './types';
+/**
+ * This is the main function exported from this module. It'll
+ * look at your options, determine the best way to sign a file,
+ * and then return one of our internal functions to do the actual
+ * signing.
+ *
+ * @param options
+ * @returns {Promise<void>}
+ *
+ * @category Sign
+ */
+export declare function sign(options: SignOptions): Promise<void>;