Add event machine and json validation dependencies

Gemfile.lock

@@ -2,6 +2,9 @@ PATH
   remote: .
   specs:
     rex (0.1.0)
+      em-websocket (~> 0.5)
+      eventmachine (~> 1.2)
+      json-schema (~> 4)
       rbtree (~> 0.4.6)
 
 GEM
@@ -17,6 +20,8 @@ GEM
       minitest (>= 5.1)
       mutex_m
       tzinfo (~> 2.0)
+    addressable (2.8.6)
+      public_suffix (>= 2.0.2, < 6.0)
     ast (2.4.2)
     base64 (0.1.1)
     bigdecimal (3.1.4)
@@ -26,11 +31,18 @@ GEM
     docile (1.4.0)
     drb (2.1.1)
       ruby2_keywords
+    em-websocket (0.5.3)
+      eventmachine (>= 0.12.9)
+      http_parser.rb (~> 0)
+    eventmachine (1.2.7)
     factory_bot (6.3.0)
       activesupport (>= 5.0.0)
+    http_parser.rb (0.8.0)
     i18n (1.14.1)
       concurrent-ruby (~> 1.0)
     json (2.6.3)
+    json-schema (4.1.1)
+      addressable (>= 2.8)
     language_server-protocol (3.17.0.3)
     lint_roller (1.1.0)
     minitest (5.20.0)
@@ -39,6 +51,7 @@ GEM
     parser (3.2.2.4)
       ast (~> 2.4.1)
       racc
+    public_suffix (5.0.4)
     racc (1.7.1)
     rainbow (3.1.1)
     rake (13.0.6)

rex.gemspec

@@ -28,6 +28,10 @@ Gem::Specification.new do |spec|
 
   spec.add_dependency "rbtree", "~> 0.4.6"
 
+  spec.add_runtime_dependency "eventmachine", "~> 1.2"
+  spec.add_runtime_dependency "em-websocket", "~> 0.5"
+
+  spec.add_runtime_dependency "json-schema", "~> 4"
   # For more information and examples about making a new gem, check out our
   # guide at: https://bundler.io/guides/creating_gem.html
 end