Update to sixfish for docs. Add a gem badge to the readme.

FossilOrigin-Name: 598b833431986b476da81ad0ffefdf96e976c33d3dafced8fdd5f3e88018c98d

README.md

@@ -15,6 +15,8 @@ github mirror
 
 This is a Ruby (MRI) binding for the libmdbx database library.
 
+[![Gem Version](https://badge.fury.io/rb/mdbx.svg)](https://badge.fury.io/rb/mdbx)
+
 libmdbx is an extremely fast, compact, powerful, embedded, transactional
 key-value database, with a permissive license. libmdbx has a specific set
 of properties and capabilities, focused on creating unique lightweight

Rakefile

@@ -19,5 +19,6 @@ Rake::DevEiate.setup( 'mdbx' ) do |project|
 		focused on creating unique lightweight solutions.
 	END_DESC
 	project.authors = [ 'Mahlon E. Smith <mahlon@martini.nu>' ]
+    project.rdoc_generator = :sixfish
 end
 

gem.deps.rb

@@ -7,7 +7,7 @@ group( :development ) do
 	gem 'rake',                    '~> 13.0'
 	gem 'rake-compiler',           '~> 1.1'
 	gem 'rake-deveiate',           '~> 0.15', '>= 0.15.1'
-	gem 'rdoc-generator-fivefish', '~> 0.4'
+	gem 'rdoc-generator-sixfish',  '~> 0.2'
 	gem 'rspec',                   '~> 3.9'
 	gem 'rubocop',                 '~> 0.93'
 	gem 'simplecov',               '~> 0.12'