Remove git dependency from gemspec and fix MySQL CI configuration

Author: seuros

.github/workflows/ci.yml

@@ -32,8 +32,6 @@ jobs:
         ports:
           - 3306:3306
         env:
-          MYSQL_USER: root
-          MYSQL_PASSWORD: root
           MYSQL_DATABASE: closure_tree_test
           MYSQL_ROOT_PASSWORD: root
         options: >-
@@ -73,7 +71,7 @@ jobs:
           DATABASE_URL_SQLITE3: 'sqlite3::memory:'
         run: |
           cd test/dummy
-          bundle exec rails db:setup_all
+          bundle exec railsmake db:setup_all
 
       - name: Run tests
         env:

closure_tree.gemspec

@@ -21,9 +21,7 @@ Gem::Specification.new do |gem|
     'rubygems_mfa_required' => 'true'
   }
 
-  gem.files = `git ls-files`.split($/).reject do |f|
-    f.match(/^(test|img|gemfiles)/)
-  end
+  gem.files = Dir.glob('{lib}/**/*') + Dir.glob('bin/*') + %w[README.md CHANGELOG.md MIT-LICENSE closure_tree.gemspec]
 
   gem.required_ruby_version = '>= 3.3.0'