Loosen requirement for faraday multipart - Support Ruby 4.0 (#372)

* Loosen requirement for faraday multipart

* Update ci.yml

* Add ostruct as a dependency in mailgun.gemspec

* Update deps

* Remove Ruby 2.6 and 2.7 from CI matrix

* Update required Ruby version to 3.0.0

---------

Co-authored-by: Alex Lebedev <6421109+alex-leb@users.noreply.github.com>

Author: frederikspang

.github/workflows/ci.yml

@@ -11,14 +11,13 @@ permissions:
 
 jobs:
   test:
-
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: [ '2.6', '2.7', '3.0', '3.1', '3.4' ]
+        ruby-version: [ '3.0', '3.1', '3.4', '4.0' ]
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:

mailgun.gemspec

@@ -25,20 +25,19 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.required_ruby_version = '>= 2.6.10'
+  spec.required_ruby_version = '>= 3.0.0'
 
   spec.add_development_dependency 'bundler', '>= 1.16.2'
   spec.add_development_dependency 'rspec', '~> 3.13.0'
-  spec.add_development_dependency 'rspec-its', '~> 1.3.1'
-  spec.add_development_dependency 'rake', '~> 12.3.2'
+  spec.add_development_dependency 'rspec-its', '~> 2.0.0'
+  spec.add_development_dependency 'rake', '~> 13.3.1'
   spec.add_development_dependency 'webmock', '~> 3.7'
-  spec.add_development_dependency 'pry', '~> 0.15.2'
-  spec.add_development_dependency 'vcr', '~> 3.0.3'
+  spec.add_development_dependency 'pry', '~> 0.16.0'
+  spec.add_development_dependency 'vcr', '~> 6.4.0'
   spec.add_development_dependency 'simplecov', '~> 0.16.1'
   spec.add_development_dependency 'rails'
   spec.add_dependency 'mini_mime'
   spec.add_dependency 'faraday', "~> 2.1"
-  spec.add_dependency 'faraday-multipart', '~> 1.1.0'
+  spec.add_dependency 'faraday-multipart', '< 2'
   spec.add_dependency 'zeitwerk'
-
 end

spec/spec_helper.rb

@@ -1,4 +1,5 @@
 require 'simplecov'
+
 SimpleCov.start do
   add_filter "/spec/"
 end