community/font-opensans: add replaces for ttf-opensans

also remove unneeded depends

community/font-opensans/APKBUILD

@@ -9,7 +9,10 @@ url="https://github.com/googlefonts/opensans"
 arch="noarch"
 license="Apache-2.0"
 options="!check" # is a font
-depends="fontconfig mkfontdir mkfontscale !ttf-opensans"
+depends="fontconfig mkfontscale"
+# for backward compatibility (Alpine <3.16)
+replaces="ttf-opensans"
+provides="ttf-opensans=$pkgver-r$pkgrel"
 source="$pkgname-$pkgver.tar.gz::https://github.com/googlefonts/opensans/archive/$_commit.tar.gz"
 builddir="$srcdir/opensans-$_commit"