Position model x and y should be floats

[tyates-indeed]

GitLab changed the data type of the x and y parameters of Position in v13.7 but did not update their documentation.

I opened an issue with them and they have now updated their docs to correctly list the data type for the x and y coordinates of position as float: https://gitlab.com/gitlab-org/gitlab/-/issues/324201

gitlab4j should be updated to support these new data types as current behavior with v13.7+ of GitLab causes exceptions when trying to parse image diff notes since the float values for x and y cannot be converted to the Integer type that gitlab4j expects.