lint: stricter type checking

lua/oil/adapters/ssh/connection.lua

@@ -176,6 +176,7 @@ function SSHConnection.new(url)
     end
   end)
 
+  ---@cast self oil.sshConnection
   return self
 end
 

lua/oil/adapters/ssh/sshfs.lua

@@ -70,6 +70,7 @@ end
 ---@param url oil.sshUrl
 ---@return oil.sshFs
 function SSHFS.new(url)
+  ---@type oil.sshFs
   return setmetatable({
     conn = SSHConnection.new(url),
   }, {