fix: test cases were broken

test/context_test.cxx

@@ -47,7 +47,7 @@ TEST(Context, CanAccessChildren) {
   
   reflection::Context ctx{reflect(arg0)};
 
-  reflection::Object b = ctx.get(std::vector{"arg0", "b"});
+  reflection::Object b = ctx.get("arg0").get("b");
   EXPECT_THAT(int(b), 1);
 }
 
@@ -56,7 +56,7 @@ TEST(Context, CanProvideMutableAccess) {
   
   reflection::Context ctx{reflect(arg0)};
 
-  reflection::Object b = ctx.get(std::vector{"arg0", "b"});
+  reflection::Object b = ctx.get("arg0").get("b");
   EXPECT_NO_THROW(b = 2);
   EXPECT_THAT(arg0.b, 2);
 }
@@ -66,7 +66,7 @@ TEST(Context, CanMutateWithPairCtor) {
   
   reflection::Context ctx{{"arg0", arg0}};
 
-  reflection::Object b = ctx.get(std::vector{"arg0", "b"});
+  reflection::Object b = ctx.get("arg0").get("b");
   EXPECT_NO_THROW(b = 2);
   EXPECT_THAT(arg0.b, 2);
 }