Add pry debugging tools

Pry stack explorer and byebug are useful tools to have for debugging
this extension.

1 files changed, 2 insertions, 0 deletions

diff --git a/Gemfile b/Gemfile
index 6be78e4..8e43ed3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -25,6 +25,8 @@ end
 
 group :development, :test do
   gem "pry"
+  gem "pry-stack_explorer"
+  gem "pry-byebug"
 end
 
 gemspec