Convert --year option to Numeric.

Should fix issue #8.

Author: Ryan Jacobs

bin/github-copywriter

@@ -29,7 +29,9 @@ Usage: #{executable_name} [repos...]
     end
 
     opts.on("-y", "--year YEAR", "Update copyrights to a given year.") do |year|
-        if year.to_i >= 1000 && year.to_i <= 9999 then
+        year = year.to_i
+
+        if year >= 1000 && year <= 9999 then
             options[:year] = year
         else
             puts "error: year must be four digits".red

lib/github-copywriter/version.rb

@@ -8,6 +8,6 @@ class Copywriter
 
     # Current version
     # @return [String]
-    VERSION = "1.2.1".freeze
+    VERSION = "1.2.2".freeze
 
 end