Log level is uppercased

lib/cross-post.rb

@@ -11,7 +11,7 @@ OpenURI::Buffer.const_set 'StringMax', 0
 
 class CrossPost
 	LOGGER = Logger.new STDERR
-	LOGGER.level = Logger.const_get ENV.fetch('LOG', 'INFO')
+	LOGGER.level = Logger.const_get ENV.fetch('LOG', 'INFO').upcase
 	LOGGER.formatter = proc do |severity, time, _, msg|
 		time = time.strftime '%Y-%m-%dT%H:%M:%S.%6N'.freeze
 		"#{time} #{severity} #{msg}\n"