Update net-ssh gem to ~> 5.2

Gemfile

@@ -419,7 +419,7 @@ gem 'vmstat', '~> 2.3.0'
 gem 'sys-filesystem', '~> 1.1.6'
 # SSH host key support
-gem 'net-ssh', '~> 5.0'
+gem 'net-ssh', '~> 5.2'
 gem 'sshkey', '~> 2.0'
 # Required for ED25519 SSH host key support

Gemfile.lock

@@ -515,7 +515,7 @@ GEM
     mysql2 (0.4.10)
     nakayoshi_fork (0.0.4)
     net-ldap (0.16.0)
-    net-ssh (5.0.1)
+    net-ssh (5.2.0)
     netrc (0.11.0)
     nio4r (2.3.1)
     nokogiri (1.10.3)
@@ -1142,7 +1142,7 @@ DEPENDENCIES
   mysql2 (~> 0.4.10)
   nakayoshi_fork (~> 0.0.4)
   net-ldap
-  net-ssh (~> 5.0)
+  net-ssh (~> 5.2)
   nokogiri (~> 1.10.3)
   oauth2 (~> 1.4)
   octokit (~> 4.9)