update electron to v43

electron/node_modules/electron-winstaller/lib/sign.d.ts

@@ -0,0 +1,15 @@
+import { SquirrelWindowsOptions } from './options';
+/**
+ * This method uses @electron/windows-sign to create a fake signtool.exe
+ * that can be called by Squirrel - but then just calls @electron/windows-sign
+ * to actually perform the signing.
+ *
+ * That's useful for users who need a high degree of customization of the signing
+ * process but still want to use @electron/windows-installer.
+ */
+export declare function createSignTool(options: SquirrelWindowsOptions): Promise<void>;
+/**
+ * Ensure that signtool.exe is actually the "real" signtool.exe, not our
+ * fake substitute.
+ */
+export declare function resetSignTool(): Promise<void>;