Update Ruby versions

Author: corny

.github/workflows/rspec.yml

@@ -8,7 +8,7 @@ jobs:
     name: Ruby ${{ matrix.ruby }}
     strategy:
       matrix:
-        ruby:  ['3.0', '3.2', '3.3']
+        ruby:  ['3.2', '3.3', '3.4']
 
     steps:
     - uses: actions/checkout@v4

.github/workflows/validate-fixtures.yml

@@ -16,7 +16,7 @@ jobs:
 
     - uses: ruby/setup-ruby@v1
       with:
-        ruby-version:  "3.2"
+        ruby-version:  "3.4"
         bundler-cache: true
 
     - name: Prepare validator

Gemfile.lock

@@ -2,12 +2,16 @@ PATH
   remote: .
   specs:
     xrechnung (0.6.1)
+      base64
+      bigdecimal
       builder (~> 3.2)
 
 GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    base64 (0.3.0)
+    bigdecimal (3.2.2)
     builder (3.3.0)
     csv (3.3.0)
     diff-lcs (1.5.1)
@@ -81,4 +85,4 @@ DEPENDENCIES
   xrechnung!
 
 BUNDLED WITH
-   2.4.19
+   2.7.0

xrechnung.gemspec

@@ -22,6 +22,8 @@ Gem::Specification.new do |spec|
 
   spec.require_paths = ["lib"]
 
+  spec.add_dependency "base64"
+  spec.add_dependency "bigdecimal"
   spec.add_dependency "builder", "~> 3.2"
 
   spec.add_development_dependency "httparty", "~> 0.22"