Drop git ls-files in gemspec

[utkarsh2102]

Hi @olleolleolle,

Thanks for maintaining this so far! ❤️
As discussed in #68, this PR drops the usage of git to list the files and only ships the files that are necessary for end-users 🚀

Closes: #68

Signed-off-by: Utkarsh Gupta <utkarsh@debian.org>

[coveralls]

Coverage remained the same at 0.0% when pulling 7ce601c on utkarsh2102:drop-git into 0ee8958 on savonrb:master.

[olleolleolle]

@utkarsh2102 To make this PR mergeable now, without any other changes, please omit the rubocop-packaging change.
It's a good idea, but other changes are needed to include it, now.

rubocop-packaging (~> 0.1.1) was resolved to 0.1.1, which depends on

      ruby (>= 2.3.0)

[utkarsh2102]

Hi @olleolleolle,

Eeks, I am sorry, I should've checked! :/
How about this diff:

--- a/Gemfile
+++ b/Gemfile
@@ -5,6 +5,10 @@ gem 'simplecov',       :require => false
 gem 'method_profiler', :require => false
 gem 'coveralls',       :require => false
 
+if RUBY_VERSION >= '2.3'
+  gem 'rubocop-packaging',  :require => false
+end
+
 platform :rbx do
   gem 'json'
   gem 'racc'

I hope that's better and okay?

[olleolleolle]

It's alright if the build gets to green, try it!

[utkarsh2102]

Sorry for not checking the build failures earlier (my bad!).
Green again! 🎉

[olleolleolle]

Thanks so much for this!