Use version of importmap that support loading outside of an app

We are using it in a few scripts, and we were doing workarounds
to be able to use outside an Rails application.

Now the workaround is gone.

Gemfile

@@ -27,7 +27,7 @@ gem "stimulus-rails"
 gem "turbo-rails"
 gem "jsbundling-rails"
 gem "cssbundling-rails"
-gem "importmap-rails"
+gem "importmap-rails", ">= 1.2.3"
 gem "tailwindcss-rails"
 gem "dartsass-rails"
 # require: false so bcrypt is loaded only when has_secure_password is used.

Gemfile.lock

@@ -178,8 +178,8 @@ GEM
     cgi (0.3.6)
     chef-utils (18.1.29)
       concurrent-ruby
-    concurrent-ruby (1.1.10)
-    connection_pool (2.3.0)
+    concurrent-ruby (1.2.2)
+    connection_pool (2.4.1)
     crack (0.4.5)
       rexml
     crass (1.0.6)
@@ -280,12 +280,14 @@ GEM
     image_processing (1.12.2)
       mini_magick (>= 4.9.5, < 5)
       ruby-vips (>= 2.0.17, < 3)
-    importmap-rails (1.1.5)
+    importmap-rails (1.2.3)
       actionpack (>= 6.0.0)
+      activesupport (>= 6.0.0)
       railties (>= 6.0.0)
     io-console (0.6.0)
-    irb (1.6.2)
-      reline (>= 0.3.0)
+    irb (1.8.3)
+      rdoc
+      reline (>= 0.3.8)
     jbuilder (2.11.5)
       actionview (>= 5.0.0)
       activesupport (>= 5.0.0)
@@ -303,7 +305,7 @@ GEM
     listen (3.8.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    loofah (2.21.3)
+    loofah (2.21.4)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
     mail (2.8.1)
@@ -322,8 +324,8 @@ GEM
     memoist (0.16.2)
     mini_magick (4.12.0)
     mini_mime (1.1.2)
-    mini_portile2 (2.8.4)
-    minitest (5.19.0)
+    mini_portile2 (2.8.5)
+    minitest (5.20.0)
     minitest-bisect (1.6.0)
       minitest-server (~> 1.0)
       path_expander (~> 1.1)
@@ -417,7 +419,7 @@ GEM
     redis-namespace (1.10.0)
       redis (>= 4)
     regexp_parser (2.8.2)
-    reline (0.3.2)
+    reline (0.3.9)
       io-console (~> 0.5)
     representable (3.2.0)
       declarative (< 0.1.0)
@@ -526,7 +528,7 @@ GEM
       railties (>= 6.0.0)
     terser (1.1.13)
       execjs (>= 0.3.0, < 3)
-    thor (1.2.2)
+    thor (1.3.0)
     timeout (0.4.0)
     tomlrb (2.0.3)
     trailblazer-option (0.1.2)
@@ -535,7 +537,7 @@ GEM
       actionpack (>= 6.0.0)
       activejob (>= 6.0.0)
       railties (>= 6.0.0)
-    tzinfo (2.0.5)
+    tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     uber (0.1.0)
     unicode-display_width (2.5.0)
@@ -588,7 +590,7 @@ DEPENDENCIES
   delayed_job_active_record
   google-cloud-storage (~> 1.11)
   image_processing (~> 1.2)
-  importmap-rails
+  importmap-rails (>= 1.2.3)
   jbuilder
   jsbundling-rails
   json (>= 2.0.0)

actiontext/Rakefile

@@ -27,7 +27,7 @@ namespace :test do
 end
 
 task :vendor_trix do
-  module Importmap; end
+  require "importmap-rails"
   require "importmap/packager"
 
   packager = Importmap::Packager.new(vendor_path: "app/assets/javascripts")

guides/Rakefile

@@ -38,7 +38,7 @@ namespace :guides do
   end
 
   task :vendor_javascript do
-    module Importmap; end
+    require "importmap-rails"
     require "importmap/packager"
 
     packager = Importmap::Packager.new(vendor_path: "assets/javascripts")