Add crew version <name> command to get versions of packages. (#13027)

* Add crew version <name> command to get versions of packages.

Signed-off-by: Satadru Pramanik <satadru@gmail.com>

* bump version

Signed-off-by: Satadru Pramanik <satadru@gmail.com>

* Add to Readme.

Signed-off-by: Satadru Pramanik <satadru@gmail.com>

---------

Signed-off-by: Satadru Pramanik <satadru@gmail.com>

bin/crew

@@ -46,7 +46,7 @@ begin
 rescue Docopt::Exit => e
   if ARGV[0]
     case ARGV[0]
-    when '-V', '--version', 'version'
+    when '-V', '--version'
       puts CREW_VERSION
       exit 0
     when '-L', '--license', 'license'
@@ -2046,6 +2046,18 @@ def upstream_command(args)
   end
 end
 
+def version_command(args)
+  args = { '<name>' => args.split } if args.is_a? String
+  if args['<name>'].empty?
+    puts CREW_VERSION
+  else
+    args['<name>'].each do |name|
+      search name
+      puts @pkg.version
+    end
+  end
+end
+
 def whatprovides_command(args)
   args['<pattern>'].each do |regex|
     Command.whatprovides(regex)