remove EOL ruby support (#813)

.github/workflows/test.yml

@@ -58,16 +58,16 @@ jobs:
   test:
     strategy:
       matrix:
-        ruby-version: ["2.5", "3.1", "jruby"]
+        ruby-version: ["2.6", "3.1", "jruby"]
         platform: [ubuntu-latest, macos-latest] # , windows-latest]
         # test only latest version on macos and windows
         exclude:
           - platform: macos-latest
-            ruby-version: "2.5"
+            ruby-version: "2.6"
           - platform: macos-latest
             ruby-version: "jruby"
           # - platform: windows-latest
-          #   ruby-version: '2.5'
+          #   ruby-version: '2.6'
           # - platform: windows-latest
           #   ruby-version: '2.6'
     runs-on: ${{ matrix.platform }}

.rubocop.yml

@@ -1,7 +1,7 @@
 # This file is based on https://github.com/rails/rails/blob/master/.rubocop.yml (MIT license)
 # Automatically generated by OpenAPI Generator (https://openapi-generator.tech)
 AllCops:
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: 2.7
   # RuboCop has a bunch of cops enabled by default. This setting tells RuboCop
   # to ignore them, so only the ones explicitly set in this file are enabled.
   DisabledByDefault: true

README.md

@@ -7,7 +7,7 @@ The code is generated using [`generator`](https://github.com/DataDog/datadog-api
 
 Installing and using the API client library requires:
 
-1. Ruby 2.2+
+1. Ruby 2.6+
 
 ## Installation