v3.0.0-alpha.8

NOTE: Documentation https://resty.dev, also use godoc and test cases for the time being.

• feat(enhancement): multipart populate filename from path if file path value is empty by @jeevatkm in #944
• test: adjust time duration on circuit breaker test and readme update by @jeevatkm in #945
• feat(enhancement): add missing SetHeaderAuthorizationKey from the mutex implementation and the flow of it by @jeevatkm in #947
• feat(enhancement): use request hostname if path is empty or '/' for save response by @jeevatkm in #948
• feat: add flate pool to reuse the reader by @jeevatkm in #949