Update to 2.1.4 to satisfy pwntools (Red Hat Bugzilla #2383857)

Signed-off-by: W. Michael Petullo <mike@flyn.org>

unicorn.spec

@@ -44,7 +44,6 @@ needed for developing applications using unicorn.
 Summary:        %{summary}
 Requires:       %{name} = %{version}-%{release}
 Requires:       python3-setuptools
-Requires:       python3-pkg-resources
 %{?python_provide:%python_provide python3-%{name}}
 
 %description -n python3-unicorn