- Fix rubocop errors on Ruby 2.2 and try to fix Open3 options error on jRuby

Author: nthachus

lib/libreconv.rb

@@ -64,7 +64,7 @@ def convert
     # @return [String]
     # @raise [ConversionFailedError]  When soffice command execution error.
     def execute_command(command, target_path)
-      opts = RUBY_PLATFORM =~ /java/ ? nil : { unsetenv_others: true }
+      opts = RUBY_PLATFORM =~ /java/ ? {} : { unsetenv_others: true }
       output, error, status = Open3.capture3 command_env, *command, opts
 
       target_tmp_file = File.join(target_path, target_filename)

lib/libreconv/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Libreconv
-  VERSION = '0.9.5'
+  VERSION = '0.9.5' # rubocop:disable Style/MutableConstant, Lint/UnneededCopDisableDirective
 end