Adopt SPDX identifiers for license fields

.SRCINFO

@@ -5,7 +5,7 @@ pkgbase = florence
 	url = http://sourceforge.net/projects/florence/
 	arch = i686
 	arch = x86_64
-	license = GPL
+	license = GPL-2.0-or-later
 	makedepends = intltool>=0.23
 	depends = gtk3
 	depends = libxml2

PKGBUILD

@@ -9,7 +9,7 @@ pkgrel=3
 pkgdesc='A configurable on-screen virtual keyboard'
 arch=('i686' 'x86_64')
 url="http://sourceforge.net/projects/${pkgname}/"
-license=('GPL')
+license=('GPL-2.0-or-later')
 depends=('gtk3' 'libxml2' 'librsvg' 'libxtst' 'gettext' 'gstreamer>=1.0') # http://florence.sourceforge.net/english/install.html
 makedepends=('intltool>=0.23')
 source=("http://sourceforge.net/projects/${pkgname}/files/${pkgname}/${pkgver}/${pkgname}-${pkgver}.tar.bz2")