Follow emoji data files header change

The header of emoji data files in UCD, which were moved at 13.0.0, has
been changed since 14.0.0.  It seems to be the same as other files in
UCD.

tool/enc-unicode.rb

@@ -311,18 +311,19 @@ end
 def data_foreach(name, &block)
   fn = get_file(name)
   warn "Reading #{name}"
+  File.open(fn, 'rb') do |f|
     if /^emoji/ =~ name
-    sep = ""
-    pat = /^# #{Regexp.quote(File.basename(name))}.*^# Version: ([\d.]+)/m
+      line = f.gets("")
+      # Headers till Emoji 13
+      version = line[/^# #{Regexp.quote(File.basename(name))}.*^# Version: ([\d.]+)/m, 1]
       type = :Emoji
     else
-    sep = "\n"
-    pat = /^# #{File.basename(name).sub(/\./, '-([\\d.]+)\\.')}/
+      # Headers since Emoji 14 or other Unicode data
+      line = f.gets("\n")
       type = :Unicode
     end
-  File.open(fn, 'rb') do |f|
-    line = f.gets(sep)
-    unless version = line[pat, 1]
+    version ||= line[/^# #{File.basename(name).sub(/\./, '-([\\d.]+)\\.')}/, 1]
+    unless version
       raise ArgumentError, <<-ERROR
 #{name}: no #{type} version
 #{line.gsub(/^/, '> ')}
@@ -330,7 +331,7 @@ def data_foreach(name, &block)
     end
     if !(v = $versions[type])
       $versions[type] = version
-    elsif v != version
+    elsif v != version and "#{v}.0" != version
       raise ArgumentError, <<-ERROR
 #{name}: #{type} version mismatch: #{version} to #{v}
 #{line.gsub(/^/, '> ')}