Fixed a case with merging request options in Poll

src/Poll.test.tsx

@@ -678,5 +678,26 @@ describe("Poll", () => {
       expect(children.mock.calls[1][1].loading).toEqual(false);
       expect(children.mock.calls[1][0]).toEqual({ id: 1 });
     });
+
+    it("should merge headers with providers", async () => {
+      nock("https://my-awesome-api.fake", { reqheaders: { foo: "bar", baz: "qux" } })
+        .get("/")
+        .reply(200, { id: 1 });
+
+      const children = jest.fn();
+      children.mockReturnValue(<div />);
+
+      render(
+        <RestfulProvider base="https://my-awesome-api.fake" requestOptions={{ headers: { baz: "qux" } }}>
+          <Poll path="" requestOptions={() => ({ headers: { foo: "bar" } })}>
+            {children}
+          </Poll>
+        </RestfulProvider>,
+      );
+
+      await wait(() => expect(children.mock.calls.length).toBe(2));
+      expect(children.mock.calls[1][1].loading).toEqual(false);
+      expect(children.mock.calls[1][0]).toEqual({ id: 1 });
+    });
   });
 });

src/Poll.tsx

@@ -1,3 +1,4 @@
+import merge from "lodash/merge";
 import * as qs from "qs";
 import * as React from "react";
 import equal from "react-fast-compare";
@@ -351,10 +352,7 @@ function Poll<TData = any, TError = any, TQueryParams = { [key: string]: any }>(
           <ContextlessPoll
             {...contextProps}
             {...props}
-            requestOptions={{
-              ...contextRequestOptions,
-              ...propsRequestOptions,
-            }}
+            requestOptions={merge(contextRequestOptions, propsRequestOptions)}
           />
         );
       }}