Remove need for slice when setting cache tags. Require cache key for get/set ops.

controller/controller.go

@@ -138,7 +138,7 @@ func (c *Controller) cachePage(ctx echo.Context, page Page, html *bytes.Buffer)
 		Set().
 		Group(middleware.CachedPageGroup).
 		Key(key).
-		Tags(page.Cache.Tags).
+		Tags(page.Cache.Tags...).
 		Expiration(page.Cache.Expiration).
 		Data(cp).
 		Save(ctx.Request().Context())

controller/controller_test.go

@@ -166,7 +166,7 @@ func TestController_RenderPage(t *testing.T) {
 		// Clear the tag
 		err = c.Cache.
 			Flush().
-			Tags([]string{p.Cache.Tags[0]}).
+			Tags(p.Cache.Tags[0]).
 			Exec(context.Background())
 		require.NoError(t, err)