Don't support Ruby 2.5. Added list of supported versions to Readme.

Author: bblimke

.github/workflows/CI.yml

@@ -19,7 +19,6 @@ jobs:
           - '3.0'
           - '2.7'
           - '2.6'
-          - '2.5'
           - jruby
     continue-on-error: ${{ matrix.ruby == 'head' }}
     name: Ruby ${{ matrix.ruby }}

README.md

@@ -40,12 +40,12 @@ Supported HTTP libraries
 
 Supported Ruby Interpreters
 ---------------------------
-
-* MRI 2.5
 * MRI 2.6
 * MRI 2.7
+* MRI 3.0
+* MRI 3.1
+* MRI 3.2
 * JRuby
-* Rubinius
 
 ## Installation