update electron to v43

electron/node_modules/@electron/windows-sign/dist/esm/utils/parse-env.d.ts

@@ -0,0 +1,11 @@
+/**
+ * Tries to parse an process.env string to a boolean.
+ * Will understand undefined as the default value
+ * Will understand "false", "False", "fAlse", or "0" as `false`
+ * Will understand everything else as true
+ *
+ * @export
+ * @param {string} name
+ * @return {*}  {boolean}
+ */
+export declare function booleanFromEnv(name: string): boolean | undefined;