Update Ruby/Rails test versions

- Remove EOL Rubies (<3.1) from test matrix
- Remove EOL Rails versions (<6.1) from test matrix

Author: jaredmoody

.github/workflows/build.yml

@@ -8,15 +8,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.5, 2.6, 2.7, "3.0", 3.1, head]
-        gemfile: [rails_5_2, rails_6]
-        exclude:
-          - ruby: "3.0"
-            gemfile: rails_5_2
-          - ruby: 3.1
-            gemfile: rails_5_2
-          - ruby: head
-            gemfile: rails_5_2
+        ruby: [3.1, 3.2, 3.3, head]
+        gemfile: [rails_6_1]
     continue-on-error: ${{ endsWith(matrix.ruby, 'head') }}
     env:
       BUNDLE_GEMFILE: gemfiles/${{ matrix.gemfile }}.gemfile

gemfiles/rails_5_2.gemfile

@@ -2,7 +2,7 @@
 
 source "https://rubygems.org"
 
-gem "rails", "~> 6.0.0"
+gem "rails", "~> 6.1.0"
 gem "sqlite3", "~> 1.4"
 gem "net-smtp"