Added Ruby 4.0.0 as default ruby and to CI matrix

Author: schinery

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
   test:
     strategy:
       matrix:
-        ruby: [3.2, 3.3, 3.4]
+        ruby: [3.2, 3.3, 3.4, 4.0]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6

.ruby-version

@@ -1 +1 @@
-3.4.5
+4.0.0

Gemfile.lock

@@ -68,7 +68,7 @@ GEM
     simplecov_json_formatter (0.1.4)
     unicode-display_width (3.2.0)
       unicode-emoji (~> 4.1)
-    unicode-emoji (4.1.0)
+    unicode-emoji (4.2.0)
 
 PLATFORMS
   ruby
@@ -85,4 +85,4 @@ DEPENDENCIES
   simplecov (~> 0.22)
 
 BUNDLED WITH
-   2.4.1
+  4.0.3