python3-alsa: add missing python3 dependency

srcpkgs/python3-alsa/template

@@ -1,11 +1,12 @@
 # Template file for 'python3-alsa'
 pkgname=python3-alsa
 version=1.1.6
-revision=4
+revision=5
 wrksrc="pyalsa-${version}"
 build_style=python3-module
 hostmakedepends="python3-setuptools"
 makedepends="python3-devel alsa-lib-devel"
+depends="python3"
 short_desc="Official Python bindings for ALSA"
 maintainer="Steve Prybylski <sa.prybylx@gmail.com>"
 license="GPL-2.0-only"