Bump ruby version and get tests working locally

.ruby-version

@@ -1 +1 @@
-2.7.1
+3.1.3

Gemfile

@@ -2,10 +2,15 @@ source 'https://rubygems.org'
 
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '6.0.3'
+gem 'rails', '6.1.7.3'
 
 gem 'webpacker', '~> 4.0'
 
+# We need Rails 6 (because Webpacker - oh how I wish we could drop support for
+# this train wreck.) but psych 4 is broken with Rails 6.1.7.3. The joys of open
+# source maintenance.
+gem 'psych', '< 4'
+
 # Use edge Sprockets-rails for testing
 #gem 'sprockets-rails', github: 'rails/sprockets-rails'
 #
@@ -20,3 +25,5 @@ gem 'inline_svg'
 
 gem 'pry'
 gem 'rb-readline'
+
+gem 'webrick'

Gemfile.lock

@@ -1,150 +1,168 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (6.0.3)
-      actionpack (= 6.0.3)
+    actioncable (6.1.7.3)
+      actionpack (= 6.1.7.3)
+      activesupport (= 6.1.7.3)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailbox (6.0.3)
-      actionpack (= 6.0.3)
-      activejob (= 6.0.3)
-      activerecord (= 6.0.3)
-      activestorage (= 6.0.3)
-      activesupport (= 6.0.3)
+    actionmailbox (6.1.7.3)
+      actionpack (= 6.1.7.3)
+      activejob (= 6.1.7.3)
+      activerecord (= 6.1.7.3)
+      activestorage (= 6.1.7.3)
+      activesupport (= 6.1.7.3)
       mail (>= 2.7.1)
-    actionmailer (6.0.3)
-      actionpack (= 6.0.3)
-      actionview (= 6.0.3)
-      activejob (= 6.0.3)
+    actionmailer (6.1.7.3)
+      actionpack (= 6.1.7.3)
+      actionview (= 6.1.7.3)
+      activejob (= 6.1.7.3)
+      activesupport (= 6.1.7.3)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (6.0.3)
-      actionview (= 6.0.3)
-      activesupport (= 6.0.3)
-      rack (~> 2.0, >= 2.0.8)
+    actionpack (6.1.7.3)
+      actionview (= 6.1.7.3)
+      activesupport (= 6.1.7.3)
+      rack (~> 2.0, >= 2.0.9)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.2.0)
-    actiontext (6.0.3)
-      actionpack (= 6.0.3)
-      activerecord (= 6.0.3)
-      activestorage (= 6.0.3)
-      activesupport (= 6.0.3)
+    actiontext (6.1.7.3)
+      actionpack (= 6.1.7.3)
+      activerecord (= 6.1.7.3)
+      activestorage (= 6.1.7.3)
+      activesupport (= 6.1.7.3)
       nokogiri (>= 1.8.5)
-    actionview (6.0.3)
-      activesupport (= 6.0.3)
+    actionview (6.1.7.3)
+      activesupport (= 6.1.7.3)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.1, >= 1.2.0)
-    activejob (6.0.3)
-      activesupport (= 6.0.3)
+    activejob (6.1.7.3)
+      activesupport (= 6.1.7.3)
       globalid (>= 0.3.6)
-    activemodel (6.0.3)
-      activesupport (= 6.0.3)
-    activerecord (6.0.3)
-      activemodel (= 6.0.3)
-      activesupport (= 6.0.3)
-    activestorage (6.0.3)
-      actionpack (= 6.0.3)
-      activejob (= 6.0.3)
-      activerecord (= 6.0.3)
-      marcel (~> 0.3.1)
-    activesupport (6.0.3)
+    activemodel (6.1.7.3)
+      activesupport (= 6.1.7.3)
+    activerecord (6.1.7.3)
+      activemodel (= 6.1.7.3)
+      activesupport (= 6.1.7.3)
+    activestorage (6.1.7.3)
+      actionpack (= 6.1.7.3)
+      activejob (= 6.1.7.3)
+      activerecord (= 6.1.7.3)
+      activesupport (= 6.1.7.3)
+      marcel (~> 1.0)
+      mini_mime (>= 1.1.0)
+    activesupport (6.1.7.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
-      zeitwerk (~> 2.2, >= 2.2.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
     builder (3.2.4)
-    coderay (1.1.2)
-    concurrent-ruby (1.1.6)
+    coderay (1.1.3)
+    concurrent-ruby (1.2.2)
     crass (1.0.6)
-    erubi (1.9.0)
+    date (3.3.3)
+    erubi (1.12.0)
     execjs (2.8.1)
-    globalid (0.4.2)
-      activesupport (>= 4.2.0)
-    i18n (1.8.2)
+    globalid (1.1.0)
+      activesupport (>= 5.0)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
-    inline_svg (1.7.1)
+    inline_svg (1.8.0)
       activesupport (>= 3.0)
       nokogiri (>= 1.6)
-    jbuilder (2.10.0)
+    jbuilder (2.11.5)
+      actionview (>= 5.0.0)
       activesupport (>= 5.0.0)
-    loofah (2.5.0)
+    loofah (2.19.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.7.1)
+    mail (2.8.1)
       mini_mime (>= 0.1.1)
-    marcel (0.3.3)
-      mimemagic (~> 0.3.2)
+      net-imap
+      net-pop
+      net-smtp
+    marcel (1.0.2)
     method_source (1.0.0)
-    mimemagic (0.3.10)
-      nokogiri (~> 1)
-      rake
-    mini_mime (1.0.2)
-    mini_portile2 (2.4.0)
-    minitest (5.14.1)
-    nio4r (2.5.2)
-    nokogiri (1.10.9)
-      mini_portile2 (~> 2.4.0)
-    pry (0.13.1)
+    mini_mime (1.1.2)
+    mini_portile2 (2.8.1)
+    minitest (5.18.0)
+    net-imap (0.3.4)
+      date
+      net-protocol
+    net-pop (0.1.2)
+      net-protocol
+    net-protocol (0.2.1)
+      timeout
+    net-smtp (0.3.3)
+      net-protocol
+    nio4r (2.5.8)
+    nokogiri (1.14.2)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    pry (0.14.2)
       coderay (~> 1.1)
       method_source (~> 1.0)
-    rack (2.2.2)
-    rack-proxy (0.6.5)
+    psych (3.3.4)
+    racc (1.6.2)
+    rack (2.2.6.4)
+    rack-proxy (0.7.6)
       rack
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
-    rails (6.0.3)
-      actioncable (= 6.0.3)
-      actionmailbox (= 6.0.3)
-      actionmailer (= 6.0.3)
-      actionpack (= 6.0.3)
-      actiontext (= 6.0.3)
-      actionview (= 6.0.3)
-      activejob (= 6.0.3)
-      activemodel (= 6.0.3)
-      activerecord (= 6.0.3)
-      activestorage (= 6.0.3)
-      activesupport (= 6.0.3)
-      bundler (>= 1.3.0)
-      railties (= 6.0.3)
+    rack-test (2.1.0)
+      rack (>= 1.3)
+    rails (6.1.7.3)
+      actioncable (= 6.1.7.3)
+      actionmailbox (= 6.1.7.3)
+      actionmailer (= 6.1.7.3)
+      actionpack (= 6.1.7.3)
+      actiontext (= 6.1.7.3)
+      actionview (= 6.1.7.3)
+      activejob (= 6.1.7.3)
+      activemodel (= 6.1.7.3)
+      activerecord (= 6.1.7.3)
+      activestorage (= 6.1.7.3)
+      activesupport (= 6.1.7.3)
+      bundler (>= 1.15.0)
+      railties (= 6.1.7.3)
       sprockets-rails (>= 2.0.0)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.3.0)
-      loofah (~> 2.3)
-    railties (6.0.3)
-      actionpack (= 6.0.3)
-      activesupport (= 6.0.3)
+    rails-html-sanitizer (1.5.0)
+      loofah (~> 2.19, >= 2.19.1)
+    railties (6.1.7.3)
+      actionpack (= 6.1.7.3)
+      activesupport (= 6.1.7.3)
       method_source
-      rake (>= 0.8.7)
-      thor (>= 0.20.3, < 2.0)
-    rake (13.0.1)
+      rake (>= 12.2)
+      thor (~> 1.0)
+    rake (13.0.6)
     rb-readline (0.5.5)
-    sprockets (4.0.0)
+    sprockets (4.2.0)
       concurrent-ruby (~> 1.0)
-      rack (> 1, < 3)
-    sprockets-rails (3.2.1)
-      actionpack (>= 4.0)
-      activesupport (>= 4.0)
+      rack (>= 2.2.4, < 4)
+    sprockets-rails (3.4.2)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
       sprockets (>= 3.0.0)
-    thor (1.0.1)
-    thread_safe (0.3.6)
-    tzinfo (1.2.7)
-      thread_safe (~> 0.1)
+    thor (1.2.1)
+    timeout (0.3.2)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
-    webpacker (4.2.2)
+    webpacker (4.3.0)
       activesupport (>= 4.2)
       rack-proxy (>= 0.6.1)
       railties (>= 4.2)
-    websocket-driver (0.7.1)
+    webrick (1.8.1)
+    websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.4)
-    zeitwerk (2.3.0)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.6.7)
 
 PLATFORMS
   ruby
@@ -153,10 +171,12 @@ DEPENDENCIES
   inline_svg
   jbuilder
   pry
-  rails (= 6.0.3)
+  psych (< 4)
+  rails (= 6.1.7.3)
   rb-readline
   uglifier
   webpacker (~> 4.0)
+  webrick
 
 BUNDLED WITH
    2.1.4