Allow newer patch releases to match requirement

--- a/Gemfile
+++ b/Gemfile
@@ -143,7 +143,7 @@
 gem 'wikicloth', '0.8.1'
 gem 'asciidoctor', '~> 2.0', '>= 2.0.10'
 gem 'asciidoctor-include-ext', '~> 0.3.1', require: false
-gem 'asciidoctor-plantuml', '0.0.10'
+gem 'asciidoctor-plantuml', '~> 0.0.10'
 gem 'rouge', '~> 3.18'
 gem 'truncato', '~> 0.7.11'
 gem 'bootstrap_form', '~> 4.2'