Add cgi to Gemfile and remove unused gems

Author: byroot

Gemfile

@@ -9,7 +9,6 @@ gem "megatest"
 gem "rake", "~> 13.3"
 gem "rake-compiler"
 gem "rubocop"
-gem "base64"
 gem "rubocop-minitest"
 gem "toxiproxy"
 gem "benchmark"
@@ -18,7 +17,6 @@ group :benchmark do
   gem "benchmark-ips"
   gem "hiredis"
   gem "redis", "~> 4.6"
+  gem "cgi" # For Redis 4.x
   gem "stackprof", platform: :mri
 end
-
-gem "byebug", platform: :mri

Gemfile.lock

@@ -8,10 +8,10 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
-    base64 (0.3.0)
     benchmark (0.4.1)
     benchmark-ips (2.14.0)
-    byebug (11.1.3)
+    cgi (0.4.2)
+    cgi (0.4.2-java)
     connection_pool (2.5.3)
     hiredis (0.6.3)
     hiredis (0.6.3-java)
@@ -57,10 +57,9 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  base64
   benchmark
   benchmark-ips
-  byebug
+  cgi
   hiredis
   megatest
   rake (~> 13.3)