Fix Ruby E2E tests (#6401)

Currently the `06-rails` test is failing at build time with:

```
16:27:09.550  	    'Your bundle is locked to mimemagic (0.3.3) from rubygems repository\n' +
16:27:09.550  	    'https://rubygems.org/ or installed locally, but that version can no longer be\n' +
16:27:09.550  	    'found in that source. That means the author of mimemagic (0.3.3) has removed it.\n' +
16:27:09.550  	    "You'll need to update your bundle to a version other than mimemagic (0.3.3) that\n" +
16:27:09.550  	    "hasn't been removed in order to install.",
```

So I ran `bundler update` in the "06-rails" Ruby test fixture to update the deps in the Gemfile.lock file.

packages/ruby/test/fixtures/06-rails/app/Gemfile.lock

@@ -1,123 +1,123 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.2.3)
-      actionpack (= 5.2.3)
+    actioncable (5.2.6)
+      actionpack (= 5.2.6)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailer (5.2.3)
-      actionpack (= 5.2.3)
-      actionview (= 5.2.3)
-      activejob (= 5.2.3)
+    actionmailer (5.2.6)
+      actionpack (= 5.2.6)
+      actionview (= 5.2.6)
+      activejob (= 5.2.6)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.2.3)
-      actionview (= 5.2.3)
-      activesupport (= 5.2.3)
-      rack (~> 2.0)
+    actionpack (5.2.6)
+      actionview (= 5.2.6)
+      activesupport (= 5.2.6)
+      rack (~> 2.0, >= 2.0.8)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.3)
-      activesupport (= 5.2.3)
+    actionview (5.2.6)
+      activesupport (= 5.2.6)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (5.2.3)
-      activesupport (= 5.2.3)
+    activejob (5.2.6)
+      activesupport (= 5.2.6)
       globalid (>= 0.3.6)
-    activemodel (5.2.3)
-      activesupport (= 5.2.3)
-    activerecord (5.2.3)
-      activemodel (= 5.2.3)
-      activesupport (= 5.2.3)
+    activemodel (5.2.6)
+      activesupport (= 5.2.6)
+    activerecord (5.2.6)
+      activemodel (= 5.2.6)
+      activesupport (= 5.2.6)
       arel (>= 9.0)
-    activestorage (5.2.3)
-      actionpack (= 5.2.3)
-      activerecord (= 5.2.3)
-      marcel (~> 0.3.1)
-    activesupport (5.2.3)
+    activestorage (5.2.6)
+      actionpack (= 5.2.6)
+      activerecord (= 5.2.6)
+      marcel (~> 1.0.0)
+    activesupport (5.2.6)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     arel (9.0.0)
-    bindex (0.7.0)
-    builder (3.2.3)
-    byebug (11.0.1)
-    concurrent-ruby (1.1.5)
+    bindex (0.8.1)
+    builder (3.2.4)
+    byebug (11.1.3)
+    concurrent-ruby (1.1.9)
     cowsay (0.3.0)
-    crass (1.0.4)
-    erubi (1.8.0)
+    crass (1.0.6)
+    erubi (1.10.0)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
-    i18n (1.6.0)
+    i18n (1.8.10)
       concurrent-ruby (~> 1.0)
-    jbuilder (2.9.1)
-      activesupport (>= 4.2.0)
-    loofah (2.2.3)
+    jbuilder (2.11.2)
+      activesupport (>= 5.0.0)
+    loofah (2.10.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
-    marcel (0.3.3)
-      mimemagic (~> 0.3.2)
-    method_source (0.9.2)
-    mimemagic (0.3.3)
-    mini_mime (1.0.1)
-    mini_portile2 (2.4.0)
-    minitest (5.11.3)
-    nio4r (2.3.1)
-    nokogiri (1.10.3)
-      mini_portile2 (~> 2.4.0)
-    rack (2.0.7)
+    marcel (1.0.1)
+    method_source (1.0.0)
+    mini_mime (1.1.0)
+    mini_portile2 (2.5.3)
+    minitest (5.14.4)
+    nio4r (2.5.7)
+    nokogiri (1.11.7)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
+    racc (1.5.2)
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    rails (5.2.3)
-      actioncable (= 5.2.3)
-      actionmailer (= 5.2.3)
-      actionpack (= 5.2.3)
-      actionview (= 5.2.3)
-      activejob (= 5.2.3)
-      activemodel (= 5.2.3)
-      activerecord (= 5.2.3)
-      activestorage (= 5.2.3)
-      activesupport (= 5.2.3)
+    rails (5.2.6)
+      actioncable (= 5.2.6)
+      actionmailer (= 5.2.6)
+      actionpack (= 5.2.6)
+      actionview (= 5.2.6)
+      activejob (= 5.2.6)
+      activemodel (= 5.2.6)
+      activerecord (= 5.2.6)
+      activestorage (= 5.2.6)
+      activesupport (= 5.2.6)
       bundler (>= 1.3.0)
-      railties (= 5.2.3)
+      railties (= 5.2.6)
       sprockets-rails (>= 2.0.0)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.0.4)
-      loofah (~> 2.2, >= 2.2.2)
-    railties (5.2.3)
-      actionpack (= 5.2.3)
-      activesupport (= 5.2.3)
+    rails-html-sanitizer (1.3.0)
+      loofah (~> 2.3)
+    railties (5.2.6)
+      actionpack (= 5.2.6)
+      activesupport (= 5.2.6)
       method_source
       rake (>= 0.8.7)
       thor (>= 0.19.0, < 2.0)
-    rake (12.3.2)
-    sprockets (3.7.2)
+    rake (13.0.3)
+    sprockets (4.0.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.2.1)
+    sprockets-rails (3.2.2)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-    thor (0.20.3)
+    thor (1.1.0)
     thread_safe (0.3.6)
-    tzinfo (1.2.5)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     web-console (3.7.0)
       actionview (>= 5.0)
       activemodel (>= 5.0)
       bindex (>= 0.4.0)
       railties (>= 5.0)
-    websocket-driver (0.7.0)
+    websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.3)
+    websocket-extensions (0.1.5)
 
 PLATFORMS
   ruby
@@ -131,4 +131,4 @@ DEPENDENCIES
   web-console (>= 3.3.0)
 
 BUNDLED WITH
-   2.0.1
+   2.2.15