python3-jupyter_core: rebuild for Python 3.9, drop noarch, split python3-jupyter

A python3-jupyter meta-subpackage was included in python3-jupyter_core
and created a build-time dependency cycle. The cycle is resolved by
separating python3-jupyter into its own template.

srcpkgs/python3-jupyter

@@ -1 +0,0 @@
-python3-jupyter_core

srcpkgs/python3-jupyter/template

@@ -0,0 +1,12 @@
+# Template file for 'python3-jupyter'
+# 
+# THIS PACKAGE WAS SPLIT FROM python3-jupyter_core TO AVOID A DEPENDENCY CYCLE
+pkgname=python3-jupyter
+version=4.6.3
+revision=2
+build_style=meta
+depends="python3-jupyter_notebook python3-jupyter_console python3-jupyter_ipywidgets"
+short_desc="Jupyter metapackage for Void Linux"
+maintainer="Andrew J. Hesford <ajh@sideband.org>"
+license="BSD-3-Clause"
+homepage="https://jupyter.org"

srcpkgs/python3-jupyter_core/template

@@ -1,8 +1,7 @@
 # Template file for 'python3-jupyter_core'
 pkgname=python3-jupyter_core
 version=4.6.3
-revision=1
-archs=noarch
+revision=2
 wrksrc="jupyter_core-${version}"
 build_style=python3-module
 hostmakedepends="python3-setuptools"
@@ -24,11 +23,3 @@ do_check() {
 post_install() {
 	vlicense COPYING.md LICENSE
 }
-
-python3-jupyter_package() {
-	build_style=meta
-	archs=noarch
-	depends="python3-jupyter_notebook python3-jupyter_console
-	 python3-jupyter_ipywidgets"
-	short_desc="Jupyter metapackage for Void Linux"
-}