Add funding link to gemspec

Author: coorasse

lib/passkit/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Passkit
-  VERSION = "0.3.1"
+  VERSION = "0.3.2"
 end

passkit.gemspec

@@ -17,6 +17,7 @@ Gem::Specification.new do |spec|
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = "https://github.com/coorasse/passkit"
   spec.metadata["changelog_uri"] = "https://github.com/coorasse/passkit/blob/master/CHANGELOG.md"
+  spec.metadata["funding_uri"] = "https://github.com/sponsors/coorasse"
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.