fix(.travis.yml): support combining $TEST_LEANPKG_REGISTRY and $UPLOAD
fix(.travis.yml): support combining $TEST_LEANPKG_REGISTRY and $UPLOAD

fpvandoorn/lean,leodemoura/lean,leanprover/lean,leodemoura/lean,dselsam/lean,leanprover/lean,leanprover-community/lean,leanprover/lean,leodemoura/lean,digama0/lean,Kha/lean,fpvandoorn/lean,fpvandoorn/lean,Kha/lean,dselsam/lean,leodemoura/lean,dselsam/lean,Kha/lean,fpvandoorn/lean,leanprover-community/lean,Kha/lean,digama0/lean,leodemoura/lean,fpvandoorn/lean,leanprover-community/lean,leanprover/lean,Kha/lean,dselsam/lean,leanprover-community/lean,digama0/lean,leanprover/lean,digama0/lean,dselsam/lean,leanprover-community/lean,Kha/lean,fpvandoorn/lean,leanprover-community/lean,leodemoura/lean,digama0/lean,dselsam/lean,leanprover/lean,digama0/lean