Revert "dev-lua/luacheck: drop old version"

This reverts commit a69562323f.

Signed-off-by: Conrad Kostecki <conikost@gentoo.org>

dev-lua/luacheck/Manifest

@@ -1 +1,2 @@
+DIST luacheck-0.20.0.tar.gz 132693 BLAKE2B d485ef841c00241023a9cb9bd0e1f994da3b5e79dad01281e0203e1561f788f8d1e8db97910d3a82ab3daafb3dceef1fe2897beee9f16e71350fdff27eba7fe0 SHA512 08b1a64849b329e6ad71b1d7011fac0833de068641270adaa009e9a17139968ab73add3786a508a8787ce1fcfe1f028a35b5434221e4f1f62bea56833e0e65dd
 DIST luacheck-0.23.0.tar.gz 158201 BLAKE2B c0780143a335b1deb7725819dbdac03446742fd459eed5a6de0cf3de5576f3be5379ff7086348b8880eba70dd5f7a1e719e9a09fdcc70abc293e1636f575ad57 SHA512 d76e4b22f1e9d868a8531ad51fb98607e5bfb1fbbd55053105d9978ba6c0455de99202c53d4e199733ea997863b26527fb84e7e9717209fd588f1d02db9db028

dev-lua/luacheck/luacheck-0.20.0-r1.ebuild

@@ -0,0 +1,49 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+inherit toolchain-funcs
+
+DESCRIPTION="A tool for linting and static analysis of Lua code"
+HOMEPAGE="https://github.com/mpeterv/luacheck"
+SRC_URI="https://github.com/mpeterv/luacheck/archive/${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="amd64 arm ppc ppc64 x86"
+IUSE="doc luajit test"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	dev-lua/luafilesystem[luajit(-)=]
+	!luajit? ( >=dev-lang/lua-5.1:0= )
+	luajit? ( dev-lang/luajit:2 )"
+DEPEND="${RDEPEND}
+	virtual/pkgconfig
+	doc? ( dev-python/sphinx )
+	test? ( dev-lua/busted )"
+
+DOCS=( CHANGELOG.md README.md )
+
+src_compile() {
+	if use doc; then
+		sphinx-build docsrc html || die
+	fi
+}
+
+src_test() {
+	busted -o gtest || die
+}
+
+src_install() {
+	local instdir
+	instdir="$($(tc-getPKG_CONFIG) --variable INSTALL_LMOD $(usex luajit 'luajit' 'lua'))"
+	insinto "${instdir#${EPREFIX}}"
+	doins -r src/luacheck
+
+	newbin bin/luacheck.lua luacheck
+
+	use doc && HTML_DOCS+=( html/. )
+
+	einstalldocs
+}