Add the minimum version number of go to the requirements (go failed on Fedora 28 due to go == 1.10 there)

gitea.spec

@@ -2,14 +2,14 @@ ExclusiveArch:  %{go_arches}
 
 Name:           gitea
 Version:        1.8.3
-Release:        4%{?dist}
+Release:        5%{?dist}
 Summary:        Gitea: Git with a cup of tea
 
 License:        MIT
 URL:            https://gitea.io/en-us/
 Source0:        https://github.com/go-gitea/%{name}/archive/v%{version}/%{name}-%{version}.tar.gz
 
-BuildRequires:  golang
+BuildRequires:  golang >= 1.11
 BuildRequires:  pam-devel
 Requires(pre):  /usr/bin/getent
 Requires(pre):  /usr/sbin/useradd