Provide content length for the put method

[murasakiakari]

Since there is some webdav server implementation (such as nextcloud) give unexpected behavior when there is no content length is set in the put request. Therefore, I introduce the contentLength parameter to the *Client.put() method to provide the correct content length of the body to the server to prevent the behavior mention above.

[chripo]

Thanks!
Could you add / update our tests?

[murasakiakari]

Thanks for your message.
I has some idea on how to make a unit after taking a rest, I will update the unit test asap.

[murasakiakari]

Unit test is added, thank you for your reminding