gemspec should require 'date'

[james-stocks]

Using ruby 2.3.1, I get a failure when running 'bundle exec rake -T' or 'tests/test.sh' like:

There was an error while loading `metadata-json-lint.gemspec`: uninitialized constant Date

This commit ensures that 'date' is required by the gemspec

[rnelson0]

Can you reliably reproduce this? I am not seeing this with ruby 2.3.1 from RVM:

$ ruby --version
ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-linux]
$ bundle --version
Bundler version 1.14.6
$ be rake -T
rake rubocop               # Run RuboCop
rake rubocop:auto_correct  # Auto-correct RuboCop offenses
$ tests/test.sh
Successful Test 'broken' (bin)
Successful Test 'broken' (rake: metadata_lint)
Successful Test 'perfect' (bin)
Successful Test 'perfect' (rake: metadata_lint)
...

[james-stocks]

@rnelson0 I'm not sure of the cause of this, I have:

jstocks@~/GitHub/metadata-json-lint$ (git::master) gem --version
2.6.10
jstocks@~/GitHub/metadata-json-lint$ (git::master) bundle --version
Bundler version 1.14.6
jstocks@~/GitHub/metadata-json-lint$ (git::master) rvm --version
rvm 1.29.1 (latest) by Michal Papis, Piotr Kuczynski, Wayne E. Seguin [https://rvm.io/]
jstocks@~/GitHub/metadata-json-lint$ (git::master) ruby --version
ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-darwin16]
jstocks@~/GitHub/metadata-json-lint$ (git::master) bundle exec rake -T

[!] There was an error parsing `Gemfile`:
[!] There was an error while loading `metadata-json-lint.gemspec`: uninitialized constant Date
Did you mean?  Data. Bundler cannot continue.

 #  from /Users/jstocks/GitHub/metadata-json-lint/metadata-json-lint.gemspec:4
 #  -------------------------------------------
 #    s.version     = '1.0.0'
 >    s.date        = Date.today.to_s
 #    s.summary     = 'metadata-json-lint /path/to/metadata.json'
 #  -------------------------------------------
. Bundler cannot continue.

 #  from /Users/jstocks/GitHub/metadata-json-lint/Gemfile:3
 #  -------------------------------------------
 #
 >  gemspec
 #  -------------------------------------------

jstocks@~/GitHub/metadata-json-lint$ (git::master)

[domcleal]

I'm able to reproduce the error under Bundler 1.14.6 and RVM too, and I've seen this in other projects before with various versions.

Bundler 1.13.5 doesn't appear to be requiring 'date' - or at least, if it does, the constant doesn't seem to be defined later.

[domcleal]

Thanks @james-stocks.