Update gitignore (sorry)

electron/node_modules/electron-rebuild/lib/src/arch.d.ts

@@ -0,0 +1,16 @@
+/**
+ * Runs the `uname` command and returns the trimmed output.
+ *
+ * Copied from `@electron/get`.
+ */
+export declare function uname(): string;
+export declare type ConfigVariables = {
+    arm_version?: string;
+};
+/**
+ * Generates an architecture name that would be used in an Electron or Node.js
+ * download file name.
+ *
+ * Copied from `@electron/get`.
+ */
+export declare function getNodeArch(arch: string, configVariables: ConfigVariables): string;