Adding "order" to config file cause traceback

[brakogh]

Adding "order" to config file cause traceback.
Version did-0.15-1.fc30.noarch

Minimal reproducer:
Have config file with two sections, one w/o "order" and one w/ "order":
$ cat .did/config
[general]
email = Branislav Nater bnater@redhat.com

[header]
type = header
highlights = Highlights

[foo]
order = 100
type = items
header = FOO

$ did last week
Traceback (most recent call last):
File "/usr/bin/did", line 42, in
did.cli.main()
File "/usr/lib/python3.7/site-packages/did/cli.py", line 188, in main
options, header = Options(arguments).parse()
File "/usr/lib/python3.7/site-packages/did/cli.py", line 61, in init
self.sample_stats = UserStats()
File "/usr/lib/python3.7/site-packages/did/stats.py", line 187, in init
self.stats = self.configured_plugins(config)
File "/usr/lib/python3.7/site-packages/did/stats.py", line 229, in configured_plugins
return sorted(results, key=lambda x: x.order)
TypeError: '<' not supported between instances of 'int' and 'str'

Additional info:
When "order" is set in config file, it's value is treated like string instead of int.

[psss]

Thanks for catching this. Should be fixed with 485cabd.