chore(readeof): Improve patterns to specify data types

[yyoshiki41]

Reduce false-positive patterns to specify data types. I want to pass below code that using bigquery.Read without error detections.

q := client.Query("select name, num from t1")
iter, err := q.Read(ctx)
if err != nil {
    return err
}

[dgryski]

LGTM