fix: simplify/change "revalidating" state removing action using entry

Author: cicerchia

src/lib/swr.ts

@@ -42,34 +42,28 @@ const defaultSWRParams = {
 const swrMachine: FSMMachineConfig = {
   initial: "init",
   on: {
-    revalidate: {
-      target: "revalidating",
-      action: (ctx, event) => {
+    revalidate: "revalidating",
+  },
+  states: {
+    init: {},
+    revalidating: {
+      entry: (ctx, event) => {
         if (cache.has(event.data.key)) {
-          return { ...ctx, isLoading: false, data: cache.get(event.data.key) };
+          ctx = { ...ctx, isLoading: false, data: cache.get(event.data.key) };
         } else if (event.data.options.initialData) {
           const data = event.data.options.initialData();
           if (data) {
-            return { ...ctx, isLoading: false, data };
+            ctx = { ...ctx, isLoading: false, data };
           }
         }
-      },
-    },
-  },
-  states: {
-    init: {},
-    revalidating: {
-      entry: (ctx) => {
         increaseFetching();
         return { ...ctx, isFetching: true };
       },
       on: {
         revalidate: null,
       },
       invoke: {
-        src: (_, event) => {
-          return event.data.fn();
-        },
+        src: (_, event) => event.data.fn(),
         onDone: {
           target: "success",
           action: (ctx, event) => {