Bump websocket-client-simple from 0.6.1 to 0.9.0

Bumps [websocket-client-simple](https://github.com/ruby-jp/websocket-client-simple) from 0.6.1 to 0.9.0.
- [Release notes](https://github.com/ruby-jp/websocket-client-simple/releases)
- [Changelog](https://github.com/ruby-jp/websocket-client-simple/blob/master/CHANGELOG.md)
- [Commits](ruby-jp/websocket-client-simple@v0.6.1...v0.9.0)

---
updated-dependencies:
- dependency-name: websocket-client-simple
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile

@@ -70,7 +70,7 @@ group :test do
     gem 'pry-byebug', '~> 3.10', '>= 3.10.1'
 
     gem 'rest-client', '~> 2.1.0'
-    gem 'websocket-client-simple', '~> 0.6.1'
+    gem 'websocket-client-simple', '~> 0.9.0'
 
     # Note: curb gem requires curl libraries
     # sudo apt-get install libcurl4-openssl-dev

Gemfile.lock

@@ -103,6 +103,7 @@ GEM
     msgpack (1.7.5)
     mustermann (3.0.3)
       ruby2_keywords (~> 0.0.1)
+    mutex_m (0.3.0)
     net-protocol (0.2.2)
       timeout
     net-smtp (0.5.0)
@@ -239,8 +240,10 @@ GEM
     unicode-emoji (4.0.4)
     webrick (1.9.1)
     websocket (1.2.11)
-    websocket-client-simple (0.6.1)
+    websocket-client-simple (0.9.0)
+      base64
       event_emitter
+      mutex_m
       websocket
     xmlrpc (0.3.3)
       webrick
@@ -291,7 +294,7 @@ DEPENDENCIES
   test-unit-full (~> 0.0.5)
   thin (~> 1.8)
   uglifier (~> 4.2)
-  websocket-client-simple (~> 0.6.1)
+  websocket-client-simple (~> 0.9.0)
   xmlrpc (~> 0.3.3)
 
 BUNDLED WITH