Draft: Updates for ruby-rack

• upgpkg: 3.0.8-1 One test for ruby-sinatra!1 (closed) depends on this.
• Drop dependencies on Ruby Standard Gems FS#76004.
• Ruby package guidelines update.
• Formatting
  • One entry per line for bash bash arrays.
  • Reduce use of quotes and curly braces.

PKGBUILD

@@ -12,6 +12,10 @@ arch=(any)
 license=(MIT)
 depends=(ruby)
 makedepends=(
+  ruby-rdoc
+  ruby-rake
+  ruby-bundler
+  ruby-minitest
   ruby-minitest-global_expectations
   ruby-minitest-sprint
 )
@@ -44,6 +48,7 @@ build() {
     --bindir tmp_install/usr/bin \
     $_gemname-$pkgver.gem
 
+  # remove unrepreducible files
   rm -rf tmp_install/$_gemdir/cache/
 }