dresden-versammlungen: fix date parsing

dresden-versammlungen/scrape.rb

@@ -1,12 +1,13 @@
 #!/usr/bin/env ruby
 # coding: utf-8
 
+require 'time'
 require 'open-uri'
 require 'json'
 require 'erb'
 
 def fmt_time event, key
-  t = Time.new event["Datum"]
+  t = Time.parse event["Datum"]
   times = nil
   if event["Zeit"] =~ /(\d{1,2})[\.:]?(\d{0,2})\s*-\s*(\d{1,2})[\.:]?(\d{0,2})/
     start = t.clone() + $1.to_i * 3600 + $2.to_i * 60