Enable MFA in the gemspec file

Author: blocknotes

prawn-html.gemspec

@@ -9,12 +9,17 @@ Gem::Specification.new do |spec|
   spec.version       = PrawnHtml::VERSION
   spec.summary       = 'Prawn PDF - HTML renderer'
   spec.description   = 'HTML to PDF with Prawn PDF'
+
   spec.required_ruby_version = '>= 2.5.0'
 
-  spec.license       = 'MIT'
-  spec.authors       = ['Mattia Roccoberton']
-  spec.email         = 'mat@blocknot.es'
-  spec.homepage      = 'https://github.com/blocknotes/prawn-html'
+  spec.license  = 'MIT'
+  spec.authors  = ['Mattia Roccoberton']
+  spec.email    = 'mat@blocknot.es'
+  spec.homepage = 'https://github.com/blocknotes/prawn-html'
+
+  spec.metadata['homepage_uri']          = spec.homepage
+  spec.metadata['source_code_uri']       = spec.homepage
+  spec.metadata['rubygems_mfa_required'] = 'true'
 
   spec.files         = Dir['lib/**/*', 'LICENSE.txt', 'README.md']
   spec.require_paths = ['lib']