README.md in google-style-0.3.1 vs README.md in google-style-1.24.0

@@ -29,10 +29,20 @@
 
 ```bash
 bundle exec rubocop
 ```
 
+## Versioning
+
+For all `1.x.x` gem versions:
+
+- The target and required Ruby version will match the minor gem version. `1.24.0` targets Ruby 2.4. When `1.25.0` is released, it will target Ruby 2.5, and `1.30.0` will target Ruby 3.0.
+
+- During a minor version bump, the rubocop dependency will be updated to the latest version.
+
+- For these reasons, it is highly recommended that dependencies specify at least a specific minor version of this gem.
+
 ## Contributing
 
 Contributions to this library are always welcome and highly encouraged.
 
 See the [Contributing
@@ -49,13 +59,14 @@
 This library is licensed under Apache 2.0. Full license text is available in
 [LICENSE](LICENSE).
 
 ## Supported Ruby Versions
 
-These libraries are currently supported on Ruby 2.3+.
+These libraries are currently supported on Ruby 2.4+.
 
 Google provides official support for Ruby versions that are actively supported
 by Ruby Core—that is, Ruby versions that are either in normal maintenance or
-in security maintenance, and not end of life. Currently, this means Ruby 2.3
-and later. Older versions of Ruby _may_ still work, but are unsupported and not
-recommended. See https://www.ruby-lang.org/en/downloads/branches/ for details
-about the Ruby support schedule.
+in security maintenance, and not end of life. Currently, this means Ruby 2.4
+and later. Starting with Ruby 2.4, minor releases of the google-style gem under
+`1.x.x` will correspond with the required Ruby version, with `1.24.x` requiring
+Ruby 2.4.
+See https://www.ruby-lang.org/en/downloads/branches/ for details about the Ruby support schedule.