Require base64

Gemfile

@@ -7,6 +7,8 @@ end
 
 gemspec
 
+gem "base64"
+
 group :benchmark, :test do
   gem 'benchmark-ips'
   gem 'memory_profiler'

Gemfile.lock

@@ -15,6 +15,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    base64 (0.2.0)
     benchmark-ips (2.13.0)
     json (2.7.2)
     language_server-protocol (3.17.0.3)
@@ -57,6 +58,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  base64
   benchmark-ips
   liquid!
   liquid-c!