Change version handliung, update changelog

Author: white-gecko

CHANGELOG.md

@@ -4,6 +4,18 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [Unrelease]
+
+### Added
+-
+
+### Changed
+- Switch version handling to `git describe`
+- Depend on Jekyll min 4.2
+
+### Fixed
+- assign syntax in README
+
 ## [3.2.0] - 2022-02-28
 ### Added
 - Support for Ruby 3

jekyll-rdf.gemspec

@@ -1,10 +1,6 @@
 # coding: utf-8
 VERSION = '3.2.0'
-RELEASE_VERSION = case
-    when ENV['TRAVIS'] && ENV['TRAVIS_BRANCH'].match(/^master$/i) then "#{VERSION}"
-    when ENV['TRAVIS'] && ENV['TRAVIS_BRANCH'].match(/^develop$/i) then "#{VERSION}-#{ENV['TRAVIS_BRANCH']}.#{ENV['TRAVIS_BUILD_NUMBER']}"
-    else "#{VERSION}-local"
-end
+RELEASE_VERSION = `git describe --tags --dirty --always`
 
 Gem::Specification.new do |s|
   s.name        = 'jekyll-rdf'