Update standard requirement from ~> 1.30.1 to ~> 1.31.1

Updates the requirements on [standard](https://github.com/standardrb/standard) to permit the latest version.
- [Release notes](https://github.com/standardrb/standard/releases)
- [Changelog](https://github.com/standardrb/standard/blob/main/CHANGELOG.md)
- [Commits](standardrb/standard@v1.30.1...v1.31.1)

---
updated-dependencies:
- dependency-name: standard
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

trino-client.gemspec

@@ -27,6 +27,6 @@ Gem::Specification.new do |gem|
   gem.add_development_dependency "webmock", ["~> 3.0"]
   gem.add_development_dependency "addressable", "~> 2.8.1" # 2.5.0 doesn't support Ruby 1.9.3
   gem.add_development_dependency "simplecov", "~> 0.22.0"
-  gem.add_development_dependency "standard", "~> 1.30.1"
+  gem.add_development_dependency "standard", "~> 1.31.1"
   gem.add_development_dependency "psych", "~> 3"
 end