Require importmap-rails >= 1.2.1

Follow up to #163, which uses support for passing a custom importmap to
the `javascript_importmap_tags` helper.

Author: rosa

Gemfile.lock

@@ -29,7 +29,7 @@ PATH
   remote: .
   specs:
     mission_control-jobs (0.3.3)
-      importmap-rails
+      importmap-rails (>= 1.2.1)
       irb (~> 1.13)
       rails (>= 7.1)
       stimulus-rails

mission_control-jobs.gemspec

@@ -17,7 +17,7 @@ Gem::Specification.new do |spec|
   end
 
   spec.add_dependency "rails", ">= 7.1"
-  spec.add_dependency "importmap-rails"
+  spec.add_dependency "importmap-rails", ">= 1.2.1"
   spec.add_dependency "turbo-rails"
   spec.add_dependency "stimulus-rails"
   spec.add_dependency "irb", "~> 1.13"