Require jekyll v3.8+ / nokogiri v1.10+ (#114)

* Move version.rb

* Require jekyll v3.8+ / nokogiri 1.10+

* Drop jekyll 3.7 support

Author: toshimaru

.github/workflows/ci.yml

@@ -8,7 +8,6 @@ jobs:
         gemfile:
         - gemfiles/jekyll_4.0.gemfile
         - gemfiles/jekyll_3.8.gemfile
-        - gemfiles/jekyll_3.7.gemfile
         exclude:
         - ruby: 2.4
           gemfile: gemfiles/jekyll_4.0.gemfile

Appraisals

@@ -7,7 +7,3 @@ end
 appraise 'jekyll-3.8' do
   gem 'jekyll', '3.8'
 end
-
-appraise 'jekyll-3.7' do
-  gem 'jekyll', '3.7'
-end

gemfiles/jekyll_3.7.gemfile

@@ -7,8 +7,8 @@ gem "minitest-reporters"
 gem "minitest"
 gem "pry"
 gem "rake"
-gem "rubocop"
-gem "simplecov"
+gem "rubocop", "~> 0.81"
+gem "simplecov", "~> 0.17.1"
 gem "jekyll", "3.8"
 
 gemspec path: "../"

gemfiles/jekyll_3.8.gemfile

@@ -7,8 +7,8 @@ gem "minitest-reporters"
 gem "minitest"
 gem "pry"
 gem "rake"
-gem "rubocop"
-gem "simplecov"
+gem "rubocop", "~> 0.81"
+gem "simplecov", "~> 0.17.1"
 gem "jekyll", "4.0"
 
 gemspec path: "../"

gemfiles/jekyll_4.0.gemfile

@@ -2,11 +2,11 @@
 
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
-require 'version'
+require 'table_of_contents/version'
 
 Gem::Specification.new do |spec|
   spec.name          = 'jekyll-toc'
-  spec.version       = JekyllToc::VERSION
+  spec.version       = Jekyll::TableOfContents::VERSION
   spec.summary       = 'Jekyll Table of Contents plugin'
   spec.description   = 'Jekyll (Ruby static website generator) plugin which generates a table of contents.'
   spec.authors       = %w(toshimaru torbjoernk)
@@ -19,6 +19,6 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = '>= 2.4'
 
-  spec.add_dependency 'jekyll', '>= 3.7'
-  spec.add_dependency 'nokogiri', '~> 1.9'
+  spec.add_dependency 'jekyll', '>= 3.8'
+  spec.add_dependency 'nokogiri', '~> 1.10'
 end

jekyll-toc.gemspec

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+module Jekyll
+  module TableOfContents
+    VERSION = '0.13.1'
+  end
+end