chore: add missing gem dependency from maven-tools

Fixes build on 10.0.3 which removed gems which technically should have been removed in 10.0

Author: chadlwilson

Gemfile

@@ -4,6 +4,8 @@ gemspec
 
 # override default maven-tools used by bundler
 gem 'maven-tools', '1.2.3'
+# add bigdecimal missing from transitive dependency of maven-tools
+gem 'bigdecimal'
 
 group :development, :test do
   gem 'rdoc', '~> 7.0', :require => nil