Debian already has 0.8

--- a/Gemfile
+++ b/Gemfile
@@ -84,7 +84,7 @@
 # Locked at Grape v1.4.0 until https://github.com/ruby-grape/grape/pull/2088 is merged
 # Remove config/initializers/grape_patch.rb
 gem 'grape', '= 1.4.0'
-gem 'grape-entity', '~> 0.7.1'
+gem 'grape-entity', '~> 0.8'
 gem 'rack-cors', '~> 1.0', '>= 1.0.6', require: 'rack/cors'
 
 # GraphQL API