Bump Ruby to 3.1

This is necessary to unblock
dependabot#5030, because Ubuntu
`22.04` doesn't provide an older version of `openssl`, so need a new
enough Ruby to work with the newer version of `openssl`.
See dependabot#5030 (comment)
for the gory details.

And besides, we want to move to Ruby 3.1 anyway...

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -35,7 +35,7 @@ body:
   - type: input
     attributes:
       label: Language version
-      description: If applicable, specify the language version you're using (e.g., Node.js `14.1`, Ruby `2.7`, etc.)
+      description: If applicable, specify the language version you're using (e.g., Node.js `14.1`, Ruby `3.1`, etc.)
     validations:
       required: false
 

.ruby-version

@@ -1 +1 @@
-2.7.6
+3.1.2

Dockerfile

@@ -68,7 +68,7 @@ RUN if ! getent group "$USER_GID"; then groupadd --gid "$USER_GID" dependabot ;
 
 ### RUBY
 
-ARG RUBY_VERSION=2.7.6
+ARG RUBY_VERSION=3.1.2
 ARG RUBY_INSTALL_VERSION=0.8.3
 
 ARG RUBYGEMS_SYSTEM_VERSION=3.3.22

common/dependabot-common.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
   spec.require_path = "lib"
   spec.files        = []
 
-  spec.required_ruby_version = ">= 2.7.0"
+  spec.required_ruby_version = ">= 3.1.0"
   spec.required_rubygems_version = ">= 3.3.22"
 
   spec.add_dependency "activesupport", ">= 6.0.0"

common/spec/warning_monkey_patch.rb

@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 ALLOW_PATTERNS = [
-  # Ignore parser warnings for ruby 2.7 minor version mismatches.
+  # Ignore `parser/current` warnings for ruby patch version mismatches.
   # This is a recurring issue that occurs whenever the parser gets
   # ahead of our installed ruby version.
-  %r{parser/current is loading parser/ruby27},
-  /2.7.\d-compliant syntax, but you are running 2.7.\d/,
+  %r{parser/current is loading parser/ruby31},
+  /3.1.\d-compliant syntax, but you are running 3.1.\d/,
   %r{whitequark/parser}
 ].freeze
 

omnibus/dependabot-omnibus.gemspec

@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
   spec.homepage     = common_gemspec.homepage
   spec.license      = common_gemspec.license
 
-  spec.required_ruby_version = ">= 2.7.0"
+  spec.required_ruby_version = ">= 3.1.0"
   spec.require_path = "lib"
   spec.files        = ["lib/dependabot/omnibus.rb"]