Jump on last major release as a minimal requirement

Makes sense long term, one can prefer older releases when stuck with
ancient proto versions.

Author: mostlyobvious

.github/workflows/protobuf_nested_struct_test.yml

@@ -17,9 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         ruby: [ruby-3.4, ruby-3.3, ruby-3.2]
-        gemfile: [Gemfile, Gemfile.google_protobuf_3_25]
     env:
-      BUNDLE_GEMFILE: "${{ matrix.gemfile }}"
       RUBYOPT: "--enable-frozen-string-literal"
     steps:
       - uses: actions/checkout@v4

Gemfile.google_protobuf_3_25

@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     protobuf_nested_struct (1.2.1)
-      google-protobuf (>= 3.25.7)
+      google-protobuf (>= 4.26.0)
 
 GEM
   remote: https://rubygems.org/

Gemfile.google_protobuf_3_25.lock

@@ -29,5 +29,5 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = ">= 2.7"
 
-  spec.add_dependency "google-protobuf", ">= 3.25.7"
+  spec.add_dependency "google-protobuf", ">= 4.26.0"
 end