tools: modules: committer_count: Parse date argument with Time.parse

[bcoles]

I'm not sure when or why this broke. This tool has had no meaningful updates since 2013.

Parsing the date in format YYYY-MM-DD is kind of important, as this is what the script does by default when no argument is provided:

metasploit-framework/tools/modules/committer_count.rb

Line 51 in e2e8568

date = ARGV[0] || "2005-03-22" # A day before the first SVN commit.

This crashes with Time.new. It does not crash with Time.parse.

Before

# ruby --version
ruby 3.1.2p20 (2022-04-12 revision 4491bb740a) [x86_64-linux-gnu]

# ./tools/modules/committer_count.rb | head
<internal:timev>:310:in `initialize': invalid value for Integer(): "2005-03-22" (ArgumentError)
	from ./tools/modules/committer_count.rb:47:in `new'
	from ./tools/modules/committer_count.rb:47:in `parse_date'
	from ./tools/modules/committer_count.rb:52:in `<main>'

# ./tools/modules/committer_count.rb 2023-03-23 | head
<internal:timev>:310:in `initialize': invalid value for Integer(): "2023-03-23" (ArgumentError)
	from ./tools/modules/committer_count.rb:47:in `new'
	from ./tools/modules/committer_count.rb:47:in `parse_date'
	from ./tools/modules/committer_count.rb:52:in `<main>'

After

# ./tools/modules/committer_count.rb | head
Commits since 2005-03-22
--------------------------------------------------
wchen-r7                  6475
hdm                       4688
juanvazquez               4342
William Vu                3610
egypt                     2895
todb-r7                   2848
bcook-r7                  2767
Metasploit Bot            2310

# ./tools/modules/committer_count.rb 2023-03-23 | head
Commits since 2023-03-23
--------------------------------------------------
Jack Heysel                 2
jheysel-r7                  1

[adfoster-r7]

Release Notes

Fixes a crash when parsing dates in ./tools/modules/committer_count.rb