(#371) Add missing AutoMapper maps

I believe that these are now required as a result of updating
to latest OctoKit library. These were found when attempting to run
GRM during testing.

Author: gep13

src/GitReleaseManager.Core/MappingProfiles/GitHubProfile.cs

@@ -13,9 +13,11 @@ public GitHubProfile()
             CreateMap<Model.ItemStateFilter, Octokit.ItemStateFilter>().ReverseMap();
             CreateMap<Model.RateLimit, Octokit.RateLimit>().ReverseMap();
             CreateMap<Model.Release, Octokit.Release>().ReverseMap();
+            CreateMap<Model.Release, Octokit.NewRelease>().ReverseMap();
             CreateMap<Model.ReleaseAsset, Octokit.ReleaseAsset>().ReverseMap();
             CreateMap<Model.ReleaseAssetUpload, Octokit.ReleaseAssetUpload>().ReverseMap();
             CreateMap<Model.Label, Octokit.Label>().ReverseMap();
+            CreateMap<Model.Label, Octokit.NewLabel>().ReverseMap();
             CreateMap<Model.Milestone, Octokit.Milestone>();
             CreateMap<Octokit.Milestone, Model.Milestone>()
                 .AfterMap((src, dest) => dest.Version = src.Version());