main/boost1.78: make -dev replace boost1.77-dev

ERROR: boost1.78-dev-1.78.0-r0: trying to overwrite usr/lib/libboost_prg_exec_monitor.so owned by boost1.77-dev-1.77.0-r5.

main/boost1.78/APKBUILD

@@ -2,7 +2,7 @@
 pkgname=boost1.78
 pkgver=1.78.0
 _pkgver="${pkgver//./_}"
-pkgrel=0
+pkgrel=1
 pkgdesc="Free peer-reviewed portable C++ source libraries"
 url="https://www.boost.org/"
 arch="all"
@@ -195,6 +195,11 @@ libs() {
 	rmdir "$pkgdir"/usr/lib >/dev/null 2>&1 || :
 }
 
+dev() {
+	default_dev
+	replaces="boost1.77-dev"
+}
+
 _dev() {
 	# This makes boost-dev be a metapackage that depends on boostX.Y-dev
 	mkdir -p "$subpkgdir"