Expose Syslog::VERSION

[hsbt]

There is no way to refer gem version in Ruby now. I hope to expose gem version by VERSION constant.

[knu]

I think I'd rather do it this way:

Suggested change

	source_version = ["", "ext/syslog/"].find do |dir|
	begin
	break File.open(File.join(__dir__, "#{dir}syslog.c")) {|f|
	f.gets("\n#define SYSLOG_VERSION ")
	f.gets[/\s*"(.+)"/, 1]
	}
	rescue Errno::ENOENT
	end
	source_version = %w[. ext/syslog].find do |dir|
	break $1 if File.foreach(File.join(__dir__, dir, "syslog.c")).any?(/^#define\s+SYSLOG_VERSION\s+"(.+)"/)
	rescue Errno::ENOENT