Update Ruby CI matrix: remove 2.7 and 3.0, add 3.3, 3.4, 4.0; bump required_ruby_version to >= 3.1.0

Author: dduugg

.github/workflows/build.yml

@@ -8,14 +8,16 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - ruby: 3.2
-            bundler_version: 2.4.4
           - ruby: 3.1
             bundler_version: 2.4.4
-          - ruby: 3.0
-            bundler_version: 2.4.4
-          - ruby: 2.7
+          - ruby: 3.2
             bundler_version: 2.4.4
+          - ruby: 3.3
+            bundler_version: 2.6.9
+          - ruby: 3.4
+            bundler_version: 2.6.9
+          - ruby: 4.0
+            bundler_version: 2.6.9
     env:
       CI: 1
       BUNDLER_VERSION: ${{ matrix.bundler_version }}

singed.gemspec

@@ -8,7 +8,7 @@ Gem::Specification.new do |spec|
   spec.authors = ["Josh Nichols"]
   spec.email = ["josh.nichols@gusto.com"]
   spec.summary = "Quick and easy way to get flamegraphs from a specific part of your code base"
-  spec.required_ruby_version = ">= 2.7.0"
+  spec.required_ruby_version = ">= 3.1.0"
   spec.homepage = "https://github.com/rubyatscale/singed"
   spec.metadata = {
     "source_code_uri" => "https://github.com/rubyatscale/singed",