Dropping support for Ruby 2.6 and bumping version to 2.1.0.

Many of the upstream gems no longer support Ruby 2.6, and older gems may have
security holes that cannot be resolved without updating to the latest versions.

.github/workflows/coveralls.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["2.6", "2.7", "3.0", "3.1"]
+        ruby: ["2.7", "3.0", "3.1", "3.2", "3.3"]
     runs-on: ubuntu-latest
 
     steps:

.github/workflows/ruby.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ["2.6", "2.7", "3.0", "3.1"]
+        ruby: ["2.7", "3.0", "3.1", "3.2", "3.3"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2

.rubocop.yml

@@ -5,7 +5,7 @@ inherit_from: .rubocop_todo.yml
 
 AllCops:
   NewCops: enable
-  TargetRubyVersion: 2.6
+  TargetRubyVersion: 2.7
 
 Lint/UselessAssignment:
   Exclude:

API-CHANGES.md

@@ -7,6 +7,12 @@ _Note_: API changes are expected to reduce significantly after the `1.x`
 release. In most cases, an alternative will be provided to ensure relatively
 smooth transition to the new APIs.
 
+## Release 2.1.0 Changes
+
+* Minimum Ruby version has been bumped to 2.7 and above
+
+* Updated all upstream dependencies to their latest stable versions
+
 ## Release 2.0.0 Changes
 
 * The _minimum_ required Ruby version is now `2.6` (or higher).

Gemfile.lock

@@ -1,91 +1,96 @@
 PATH
   remote: .
   specs:
-    rubytree (2.0.3)
+    rubytree (2.1.0)
       json (~> 2.0, > 2.3.1)
 
 GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
-    diff-lcs (1.5.0)
-    docile (1.4.0)
-    json (2.6.2)
-    parallel (1.22.1)
-    parser (3.1.2.0)
+    diff-lcs (1.5.1)
+    docile (1.4.1)
+    json (2.7.2)
+    language_server-protocol (3.17.0.3)
+    parallel (1.26.2)
+    parser (3.3.4.2)
       ast (~> 2.4.1)
-    power_assert (2.0.1)
+      racc
+    power_assert (2.0.3)
     psych (5.1.2)
       stringio
+    racc (1.8.1)
     rainbow (3.1.1)
-    rake (13.0.6)
-    rdoc (6.4.1.1)
+    rake (13.2.1)
+    rdoc (6.7.0)
       psych (>= 4.0.0)
-    regexp_parser (2.5.0)
-    rexml (3.2.8)
-      strscan (>= 3.0.9)
-    rspec (3.11.0)
-      rspec-core (~> 3.11.0)
-      rspec-expectations (~> 3.11.0)
-      rspec-mocks (~> 3.11.0)
-    rspec-core (3.11.0)
-      rspec-support (~> 3.11.0)
-    rspec-expectations (3.11.0)
+    regexp_parser (2.9.2)
+    rexml (3.3.5)
+      strscan
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.0)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.1)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-mocks (3.11.1)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.1)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.11.0)
-    rspec-support (3.11.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.1)
     rtags (0.97)
     rtagstask (0.0.4)
       rtags (> 0.0.0)
-    rubocop (1.30.1)
+    rubocop (1.65.1)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 3.1.0.0)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8, < 3.0)
+      regexp_parser (>= 2.4, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.18.0, < 2.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.18.0)
-      parser (>= 3.1.1.0)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.32.0)
+      parser (>= 3.3.1.0)
     rubocop-rake (0.6.0)
       rubocop (~> 1.0)
-    rubocop-rspec (2.11.1)
-      rubocop (~> 1.19)
-    ruby-progressbar (1.11.0)
-    simplecov (0.21.2)
+    rubocop-rspec (3.0.4)
+      rubocop (~> 1.61)
+    ruby-progressbar (1.13.0)
+    simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
     simplecov-lcov (0.8.0)
     simplecov_json_formatter (0.1.4)
-    stringio (3.0.6)
+    stringio (3.1.1)
     strscan (3.1.0)
-    test-unit (3.5.3)
+    test-unit (3.6.2)
       power_assert
-    unicode-display_width (2.1.0)
+    unicode-display_width (2.5.0)
     yard (0.9.36)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   bundler (~> 2.3)
-  rake (~> 13.0)
-  rdoc (~> 6.0)
+  rake (~> 13.2)
+  rdoc (~> 6.7)
   rspec (~> 3.0, > 3.10)
   rtagstask (~> 0.0.4)
-  rubocop (~> 1.0)
-  rubocop-rake (~> 0.0)
-  rubocop-rspec (~> 2.0)
+  rubocop (~> 1.65)
+  rubocop-rake (~> 0.6)
+  rubocop-rspec (~> 3.0)
   rubytree!
-  simplecov (~> 0.21)
+  simplecov (~> 0.22)
   simplecov-lcov (~> 0.8)
-  test-unit (~> 3.0)
+  test-unit (~> 3.6)
   yard (~> 0.0, >= 0.9.36)
 
 BUNDLED WITH

History.md

@@ -1,5 +1,12 @@
 # History of Changes
 
+### 2.1.0 / 2024-08-12
+
+* Minimum Ruby version has been bumped to 2.7. This is needed to use the
+  upstream gems, many of which no longer support 2.6.
+
+* Updated all dependencies to their latest stable versions.
+
 ### 2.0.0 / 2022-06-21
 
 * A major release with significant modernization to the code base and removal of

README.md

@@ -118,7 +118,7 @@ This example can also be found at
 
 ## REQUIREMENTS: ##
 
-* [Ruby][] 2.6.x and above.
+* [Ruby][] 2.7.x and above.
 
 
 * Run-time Dependencies:

lib/tree/version.rb

@@ -4,7 +4,7 @@
 #
 # Author:: Anupam Sengupta ([email protected])
 #
-# Copyright (c) 2012-2023 Anupam Sengupta. All rights reserved.
+# Copyright (c) 2012-2024 Anupam Sengupta. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
@@ -35,5 +35,5 @@
 
 module Tree
   # Rubytree Package Version
-  VERSION = '2.0.3'
+  VERSION = '2.1.0'
 end

rubytree.gemspec

@@ -3,7 +3,7 @@
 #
 # Author:: Anupam Sengupta ([email protected])
 #
-# Copyright (c) 2012-2023 Anupam Sengupta. All rights reserved.
+# Copyright (c) 2012-2024 Anupam Sengupta. All rights reserved.
 #
 # frozen_string_literal: true
 
@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
   s.email                 = '[email protected]'
   s.homepage              = 'http://rubytree.anupamsg.me'
 
-  s.required_ruby_version = '>=2.6'
+  s.required_ruby_version = '>=2.7'
 
   s.summary               = 'A generic tree data structure for Ruby.'
 
@@ -67,16 +67,16 @@ Gem::Specification.new do |s|
 
   # NOTE: Rake is added as a development and test dependency in the Gemfile.
   s.add_development_dependency 'bundler', '~> 2.3'
-  s.add_development_dependency 'rake', '~> 13.0'
-  s.add_development_dependency 'rdoc', '~> 6.0'
+  s.add_development_dependency 'rake', '~> 13.2'
+  s.add_development_dependency 'rdoc', '~> 6.7'
   s.add_development_dependency 'rspec', '~> 3.0', '> 3.10'
   s.add_development_dependency 'rtagstask', '~> 0.0.4'
-  s.add_development_dependency 'rubocop', '~> 1.0'
-  s.add_development_dependency 'rubocop-rake', '~> 0.0'
-  s.add_development_dependency 'rubocop-rspec', '~> 2.0'
-  s.add_development_dependency 'simplecov', '~> 0.21'
+  s.add_development_dependency 'rubocop', '~> 1.65'
+  s.add_development_dependency 'rubocop-rake', '~> 0.6'
+  s.add_development_dependency 'rubocop-rspec', '~> 3.0'
+  s.add_development_dependency 'simplecov', '~> 0.22'
   s.add_development_dependency 'simplecov-lcov', '~> 0.8'
-  s.add_development_dependency 'test-unit', '~> 3.0'
+  s.add_development_dependency 'test-unit', '~> 3.6'
   s.add_development_dependency 'yard', '~> 0.0', '>= 0.9.36'
 
   s.post_install_message = <<-END_MESSAGE