Merge pull request #91 from simonneutert/chore/ci-add-ruby3.3

Add Ruby v3.3 and v3.4

Author: strzibny

.github/workflows/ci.yml

@@ -22,12 +22,13 @@ jobs:
         ruby:
           - "3.1"
           - "3.2"
-          # - "ruby-head"
+          - "3.3"
+          - "3.4"
     steps:
       - name: Install system dependencies
         run: sudo apt-get install imagemagick libmagickwand-dev
       - name: Check out code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Install Ruby dependencies
         uses: ruby/setup-ruby@v1
         with:

invoice_printer.gemspec

@@ -49,6 +49,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'prawn-table', '~> 0.2.2'
   spec.add_dependency 'matrix'
   spec.add_dependency 'e2mmap'
+  spec.add_dependency 'base64'
 
   spec.add_development_dependency 'bundler', '>= 1.7'
   spec.add_development_dependency 'rake', '>= 10.0'