Fix bug caused by API redirect

Using the URL suggested by the BitBucket docs causes a redirect and returns nil, using the address it redirects to.

Author: cltweedie

lib/bitbucket_rest_api/teams.rb

@@ -37,7 +37,7 @@ def following(team_name)
     end
 
     def repos(team_name)
-      response = get_request("/2.0/teams/#{team_name.to_s}/repositories")
+      response = get_request("/2.0/repositories/#{team_name.to_s}")
       return response unless block_given?
       response["values"].each { |el| yield el }
     end

spec/bitbucket_rest_api/teams_spec.rb

@@ -114,7 +114,7 @@
     before do
       expect(team).to receive(:request).with(
         :get,
-        '/2.0/teams/team_name/repositories',
+        '/2.0/repositories/team_name',
         {},
         {}
       ).and_return({"values" => ['repo1', 'repo2', 'repo3']})