githubv4.go
func (c *Client) Query(ctx context.Context, q interface{}, variables map[string]interface{}) error {
	return c.client.Query(ctx, q, variables)
}
func (c *Client) Query(ctx context.Context, q interface{}, variables map[string]interface{}) error {
	return c.client.Query(ctx, q, variables)
}
// Query executes a single GraphQL query request,
// with a query derived from q, populating the response into it.
// q should be a pointer to struct that corresponds to the GitHub GraphQL schema.