Reenable windows CI that were disabled because of fiddle

Followup to cd91afe
Since this is still an issue, I added it to the gemfile instead of skipping the job

It can be removed once https://bugs.ruby-lang.org/issues/21645 is resolved

Author: Earlopain

.github/workflows/main.yml

@@ -65,7 +65,7 @@ jobs:
           - ubuntu-latest
           - ubuntu-24.04-arm
           - macos-latest
-          # - windows-latest <-- failing with fiddle error, temporarily disabled
+          - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v5
@@ -145,7 +145,7 @@ jobs:
           - ubuntu-latest
           - ubuntu-24.04-arm
           - macos-latest
-          # - windows-latest <-- failing with fiddle error, temporarily disabled
+          - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v5

Gemfile

@@ -11,6 +11,8 @@ gem "test-unit"
 
 platforms :mri, :mswin, :mingw, :x64_mingw do
   gem "ffi"
+  # FIXME: https://bugs.ruby-lang.org/issues/21645
+  gem "fiddle"
   gem "parser"
   gem "ruby_memcheck"
   gem "ruby_parser"

Gemfile.lock

@@ -11,6 +11,7 @@ GEM
     date (3.4.1)
     erb (5.1.1)
     ffi (1.17.2)
+    fiddle (1.1.8)
     mini_portile2 (2.8.9)
     nokogiri (1.18.10)
       mini_portile2 (~> 2.8.2)
@@ -48,6 +49,7 @@ PLATFORMS
 DEPENDENCIES
   benchmark-ips
   ffi
+  fiddle
   onigmo
   parser
   prism!