change log v1.2.1

1. support more params format

// support object which contains id attribute

Book.get({ id: 1 }).then(res => console.log(res));
Book.get({ _id: 1 }).then(res => console.log(res));

Book.update({ id: 1, name: 'foo' }).then(res => console.log(res));
Book.update({ _id: 1, name: 'foo' }).then(res => console.log(res));

Book.delete({ id: 1 }).then(res => console.log(res));
Book.delete({ _id: 1 }).then(res => console.log(res));

2. methods alias

Book.create === Book.post
Book.update === Book.put

3. params format check, if params format is wrong, throw error