Use Minitest 5.x on older Rubies

Bump to 5.5.0

Remove no-op line

Upgrade to Minitest 6

Use http.rb 5.x on older Ruby versions

Support http.rb 6.0 (#103)

Handle 3xx redirects differently when streaming (#100)

Add ruby 4.0 (#102)

Do not allow forwarding of authorization headers on redirect. (#89)

Test on Ruby 3.3 and 3.4

Fix frozen string literal warnings in Ruby 3.4

Update tests for newer HTTPX versions

Improve documentation on `:tempfile_name`

Fix specs on Ruby 3.4

Add `:tempfile_name` to other backends