LibJS: Fix old object numeric key test now that toString() is correct

Author: https://github.com/sunverwerth
Commit: f603128e55
Pull-request: https://github.com/SerenityOS/serenity/pull/3803
Reviewed-by: https://github.com/linusg

Libraries/LibJS/Tests/object-basic.js

@@ -87,8 +87,7 @@ describe("correct behavior", () => {
     test("floating point keys", () => {
         const math = { 3.14: "pi" };
         expect(math["3.14"]).toBe("pi");
-        // FIXME: Floating point literals are coerced to i32
-        // expect(math[3.14]).toBe("pi");
+        expect(math[3.14]).toBe("pi");
     });
 
     test("keywords as property keys", () => {