Update packages, add gitignore

node_modules/set-function-length/index.d.ts

@@ -0,0 +1,7 @@
+declare namespace setFunctionLength {
+    type Func = (...args: unknown[]) => unknown;
+}
+
+declare function setFunctionLength<T extends setFunctionLength.Func = setFunctionLength.Func>(fn: T, length: number, loose?: boolean): T;
+
+export = setFunctionLength;