Update to latest releases

* Newest releases are available on Windows now.

Author: eregon

.github/workflows/ci.yml

@@ -6,7 +6,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu, macos, windows ]
-        ruby: [ 2.5.7, 2.6.5, 2.7.0 ]
+        ruby: [ 2.5.8, 2.6.6, 2.7.1 ]
     runs-on: ${{ matrix.os }}-latest
     steps:
     - name: git config autocrlf