Revert "DEV: Upgradae to Bundler 2."

Revert “DEV: Upgradae to Bundler 2.”

This reverts commit f65c8a7ba1c6b3ded7b46a6c23516d167e8fdc41.

I can’t deal with this now.

diff --git a/Gemfile.lock b/Gemfile.lock
index 283b5cc..13faf68 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -572,4 +572,4 @@ DEPENDENCIES
   webpush
 
 BUNDLED WITH
-   2.0.1
+   1.17.3

GitHub sha: e50494bc