enchant2: update to 2.2.15

Also necessary for the nuspell soname bump.

Picks up comment from:
https://github.com/void-linux/void-packages/pull/27323

srcpkgs/enchant2/template

@@ -1,20 +1,21 @@
 # Template file for 'enchant2'
 pkgname=enchant2
-version=2.2.13
+version=2.2.15
 revision=1
 wrksrc="enchant-${version}"
 build_style=gnu-configure
-make_build_args="pkgdatadir=/usr/share/enchant-2"
-make_install_args="$make_build_args"
+# tests need --enable-relocatable
+configure_args="--enable-relocatable"
 hostmakedepends="pkg-config"
 makedepends="libglib-devel hunspell-devel aspell-devel libvoikko-devel
- libnuspell-devel icu-devel boost-devel"
+ libnuspell-devel"
+checkdepends="unittest-cpp"
 short_desc="Generic spell checking library"
 maintainer="Orphaned <orphan@voidlinux.org>"
 license="LGPL-2.1-or-later"
 homepage="https://abiword.github.io/enchant/"
 distfiles="https://github.com/AbiWord/enchant/releases/download/v${version}/enchant-${version}.tar.gz"
-checksum=eab9f90d79039133660029616e2a684644bd524be5dc43340d4cfc3fb3c68a20
+checksum=3b0f2215578115f28e2a6aa549b35128600394304bd79d6f28b0d3b3d6f46c03
 
 enchant2-devel_package() {
 	depends="${makedepends} ${sourcepkg}>=${version}_${revision}"