Install Python 3 based mercurial by default

Before we actually switch to Python 3 only, let's default to it.

mercurial.spec

@@ -1,7 +1,7 @@
 Summary: Mercurial -- a distributed SCM
 Name: mercurial
 Version: 5.4
-Release: 4%{?dist}
+Release: 5%{?dist}
 
 # Release: 1.rc1%%{?dist}
 
@@ -110,7 +110,7 @@ Summary:    A fast client for Mercurial command server running on Unix. It saves
 Requires:   hg = %{version}-%{release}
 
 # Let's default to Python 2, but allow some experiments
-Suggests:   hg2
+Suggests:   hg3
 
 %description chg
 chg is a C wrapper for the hg command. Typically, when you type hg, a new
@@ -335,6 +335,9 @@ fi
 
 
 %changelog
+* Mon Nov 30 2020 Miro Hrončok <mhroncok@redhat.com> - 5.4-5
+- Install Python 3 based mercurial by default
+
 * Wed Sep 02 2020 Petr Viktorin <pviktori@redhat.com> - 5.4-4
 - Add _ast to hgdemandimport ignore list
   Works around: BZ#1871992