Update docs

docs/Gemfile

@@ -9,7 +9,10 @@ source "https://rubygems.org"
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
 
+gem "activesupport", ">= 4.1.11"
+gem "jekyll", "~> 3.9"
 gem "just-the-docs", "~> 0.3"
+gem "webrick", "~> 1.7"
 
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
 # uncomment the line below. To upgrade, run `bundle update github-pages`.
@@ -25,7 +28,3 @@ gem "tzinfo-data", platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 
 # Performance-booster for watching directories on Windows
 gem "wdm", "~> 0.1" if Gem.win_platform?
-
-gem "jekyll", "~> 3.9"
-
-gem "webrick", "~> 1.7"

docs/Gemfile.lock

@@ -1,9 +1,12 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (3.2.22.5)
-      i18n (~> 0.6, >= 0.6.4)
-      multi_json (~> 1.0)
+    activesupport (6.0.3.4)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+      zeitwerk (~> 2.2, >= 2.2.2)
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
     coffee-script (2.4.1)
@@ -210,7 +213,7 @@ GEM
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
-    multi_json (1.15.0)
+    minitest (5.14.3)
     multipart-post (2.1.1)
     nokogiri (1.11.1-x64-mingw32)
       racc (~> 1.4)
@@ -244,10 +247,11 @@ GEM
       unf (~> 0.1.4)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
+    thread_safe (0.3.6)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)
-    tzinfo (2.0.4)
-      concurrent-ruby (~> 1.0)
+    tzinfo (1.2.9)
+      thread_safe (~> 0.1)
     tzinfo-data (1.2021.1)
       tzinfo (>= 1.0.0)
     unf (0.1.4)
@@ -256,11 +260,13 @@ GEM
     unicode-display_width (1.7.0)
     wdm (0.1.1)
     webrick (1.7.0)
+    zeitwerk (2.4.2)
 
 PLATFORMS
   x64-mingw32
 
 DEPENDENCIES
+  activesupport (>= 4.1.11)
   github-pages
   jekyll (~> 3.9)
   just-the-docs (~> 0.3)