Update Python 2 dependency declarations to new packaging standards

yubioath-desktop.spec

@@ -18,7 +18,7 @@
 
 Name:		yubioath-desktop
 Version:	4.2.0
-Release:	3%{?dist}
+Release:	4%{?dist}
 Summary:	Yubikey tool for generating OATH event-based HOTP and time-based TOTP codes
 
 License:	BSD
@@ -28,7 +28,7 @@ Source1:	https://github.com/thp/pyotherside/archive/%{commit1}.tar.gz#/pyothersi
 Source2:	https://github.com/qtproject/qt-solutions/archive/%{commit2}.tar.gz#/qt-solutions-%{shortcommit2}.tar.gz
 Source3:	https://github.com/Yubico/yubikey-manager/archive/%{commit3}.tar.gz#/yubikey-manager-%{shortcommit3}.tar.gz
 
-BuildRequires:		qt5-qtbase-devel qt5-qtdeclarative-devel qt5-qtsvg-devel gcc-c++ python3-devel python desktop-file-utils
+BuildRequires:		qt5-qtbase-devel qt5-qtdeclarative-devel qt5-qtsvg-devel gcc-c++ python3-devel python2 desktop-file-utils
 Requires:		pyotherside qt5-qtdeclarative qt5-qtquickcontrols pcsc-lite-ccid yubikey-manager
 Requires(post):		desktop-file-utils
 Requires(postun):	desktop-file-utils
@@ -74,6 +74,10 @@ cp %{_builddir}/%{buildsubdir}/resources/icons/yubioath.png %{buildroot}%{_datad
 %{_datadir}/applications/*
 
 %changelog
+* Sun Mar 18 2018 Iryna Shcherbina <ishcherb@redhat.com> - 4.2.0-4
+- Update Python 2 dependency declarations to new packaging standards
+  (See https://fedoraproject.org/wiki/FinalizingFedoraSwitchtoPython3)
+
 * Fri Feb 09 2018 Fedora Release Engineering <releng@fedoraproject.org> - 4.2.0-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild