docs：更新文档

node_modules/estree-walker/src/walker.ts

@@ -0,0 +1,39 @@
+import { BaseNode } from "estree";
+
+export type WalkerContext = {
+	skip: () => void;
+	remove: () => void;
+	replace: (node: BaseNode) => void;
+};
+
+export class WalkerBase {
+	protected should_skip: boolean = false;
+	protected should_remove: boolean = false;
+	protected replacement: BaseNode = null;
+
+	public context: WalkerContext = {
+		skip: () => (this.should_skip = true),
+		remove: () => (this.should_remove = true),
+		replace: (node: BaseNode) => (this.replacement = node)
+	};
+
+	public replace(parent: any, prop: string, index: number, node: BaseNode) {
+		if (parent) {
+			if (index !== null) {
+				parent[prop][index] = node;
+			} else {
+				parent[prop] = node;
+			}
+		}
+	}
+
+	public remove(parent: any, prop: string, index: number) {
+		if (parent) {
+			if (index !== null) {
+				parent[prop].splice(index, 1);
+			} else {
+				delete parent[prop];
+			}
+		}
+	}
+}