Updates the version pattern to allow letters in the format - Ref #745

lib/common/models/wp_item/versionable.rb

@@ -13,7 +13,7 @@ class WpItem
         # This check is needed because readme_url can return nil
         if has_readme?
           response = Browser.get(readme_url)
-          @version = response.body[%r{(?:stable tag|version): ([0-9.]+)}i, 1]
+          @version = response.body[/(?:stable tag|version): (?!trunk)([0-9a-z.-]+)/i, 1]
         end
       end
       @version

spec/samples/common/models/wp_item/versionable/beta1.txt

@@ -0,0 +1,8 @@
+Contributors: Ramoonus
+Donate link: http://www.ramoonus.nl
+Tags: Glow, javascript, bbc,
+Requires at least: 3.9
+Tested up to: 4.1
+Stable tag: 2.0.0-beta1
+
+This plugin adds BBCs Glow Javascript library to your set-up.

spec/shared_examples/wp_item_versionable.rb

@@ -47,6 +47,13 @@ shared_examples 'WpItem::Versionable' do
             @expected = '141007'
           end
         end
+
+        context 'when version contains letters' do
+          it 'returns it' do
+            @file     = '/beta1.txt'
+            @expected = '2.0.0-beta1'
+          end
+        end
       end
     end
   end