Use modern bundler

thatandromeda · thatandromeda · commit ee1433fe5ef9 · 2021-12-03T16:20:20.000-05:00
This will force any other devs who don't have bundler 2 to install it,
but 2.x has been around since 2018.
diff --git a/Gemfile.lock b/Gemfile.lock
@@ -74,4 +74,4 @@ DEPENDENCIES
   tzinfo-data
 
 BUNDLED WITH
-   1.16.2
+   2.2.32
