Release v1.0.0

[plezan]

After a few month of use without issues (~118 weekly download according to npm), I think the version 1 is ready to be released.

With the support of serverless v3 being dropped at the end of the year, it is more than time to release this version compatible with sls >= 3

Did you have any issue with the beta ? Do you think some changes are needed before the release ?

Looking for your feedback :)