docs: add link to newer version

.rubocop.yml

@@ -1,6 +1,5 @@
 AllCops:
-  TargetRubyVersion: '2.5'
-  NewCops: enable
+  TargetRubyVersion: '2.3'
 
 Layout/EmptyLineAfterGuardClause:
   Enabled: false

.travis.yml

@@ -5,6 +5,8 @@ rvm:
 - 2.7
 - 2.6
 - 2.5
+- 2.4
+- 2.3
 
 script:
 - bundle exec rake travis

CHANGELOG.md

@@ -1,11 +1,5 @@
 # Changelog
 
-## 3.0.0 (July 29, 2020)
-
-IMPROVEMENTS:
-
-- Drop EOL Ruby 2.4 and lower support, now minimum version supported is Ruby 2.5
-
 ## 2.3.1 (July 27, 2020)
 
 IMPROVEMENTS:

README.md

@@ -1,9 +1,10 @@
 # dyndnsd.rb
 
-[![Build Status](https://travis-ci.org/cmur2/dyndnsd.svg?branch=master)](https://travis-ci.org/cmur2/dyndnsd) [![Dependencies](https://badges.depfu.com/badges/4f25da8493f7a29f652ac892fbf9227b/overview.svg)](https://depfu.com/github/cmur2/dyndnsd)
+[![Build Status](https://travis-ci.org/cmur2/dyndnsd.svg?branch=dyndnsd-2.x)](https://travis-ci.org/cmur2/dyndnsd) [![Dependencies](https://badges.depfu.com/badges/4f25da8493f7a29f652ac892fbf9227b/overview.svg)](https://depfu.com/github/cmur2/dyndnsd)
 
 A small, lightweight and extensible DynDNS server written with Ruby and Rack.
 
+**Note:** a newer version of dyndnsd.rb is available on [branch master](https://github.com/cmur2/dyndnsd), see also the [changelog](https://github.com/cmur2/dyndnsd/blob/master/CHANGELOG.md).
 
 ## Description
 

dyndnsd.gemspec

@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
   s.executables = ['dyndnsd']
   s.extra_rdoc_files = Dir['README.md', 'CHANGELOG.md', 'LICENSE']
 
-  s.required_ruby_version = '>= 2.5'
+  s.required_ruby_version = '>= 2.3'
 
   s.add_runtime_dependency 'async-dns', '~> 1.2.0'
   s.add_runtime_dependency 'jaeger-client', '~> 0.10.0'
@@ -39,6 +39,6 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rack-test'
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rspec'
-  s.add_development_dependency 'rubocop', '~> 0.88.0'
+  s.add_development_dependency 'rubocop', '~> 0.81.0'
   s.add_development_dependency 'solargraph'
 end

lib/dyndnsd/responder/dyndns_style.rb

@@ -27,10 +27,9 @@ module Dyndnsd
       # @param body [Array{String}]
       # @return [Array{Integer,Hash{String => String},Array{String}}]
       def decorate_dyndnsd_response(status_code, headers, body)
-        case status_code
-        when 200
+        if status_code == 200
           [200, {'Content-Type' => 'text/plain'}, [get_success_body(body[0], body[1])]]
-        when 422
+        elsif status_code == 422
           error_response_map[headers['X-DynDNS-Response']]
         end
       end
@@ -40,10 +39,9 @@ module Dyndnsd
       # @param _body [Array{String}]
       # @return [Array{Integer,Hash{String => String},Array{String}}]
       def decorate_other_response(status_code, headers, _body)
-        case status_code
-        when 400
+        if status_code == 400
           [status_code, headers, ['Bad Request']]
-        when 401
+        elsif status_code == 401
           [status_code, headers, ['badauth']]
         end
       end

lib/dyndnsd/responder/rest_style.rb

@@ -27,10 +27,9 @@ module Dyndnsd
       # @param body [Array{String}]
       # @return [Array{Integer,Hash{String => String},Array{String}}]
       def decorate_dyndnsd_response(status_code, headers, body)
-        case status_code
-        when 200
+        if status_code == 200
           [200, {'Content-Type' => 'text/plain'}, [get_success_body(body[0], body[1])]]
-        when 422
+        elsif status_code == 422
           error_response_map[headers['X-DynDNS-Response']]
         end
       end
@@ -40,10 +39,9 @@ module Dyndnsd
       # @param _body [Array{String}]
       # @return [Array{Integer,Hash{String => String},Array{String}}]
       def decorate_other_response(status_code, headers, _body)
-        case status_code
-        when 400
+        if status_code == 400
           [status_code, headers, ['Bad Request']]
-        when 401
+        elsif status_code == 401
           [status_code, headers, ['Unauthorized']]
         end
       end

lib/dyndnsd/textfile_reporter.rb

@@ -28,9 +28,11 @@ module Dyndnsd
           sleep @interval
 
           Thread.new do
-            write
-          rescue StandardError => e
-            @on_error[e] rescue nil
+            begin
+              write
+            rescue StandardError => e
+              @on_error[e] rescue nil
+            end
           end
         end
       end

lib/dyndnsd/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Dyndnsd
-  VERSION = '3.0.0'
+  VERSION = '2.3.1'
 end